| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 46 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    
| 1 | One year or less | 43 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    
| 2 | 61 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 3 | 62 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 4 | 39 | 
                                                                 
                                    
                                    2.7%
                                 
                                                             | 
                                                        
                    |
| 5 | 110 | 
                                                                 
                                    
                                    7.6%
                                 
                                                             | 
                                                        
                    |
| 6 | 40 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 7 | 43 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 8 | 58 | 
                                                                 
                                    
                                    4%
                                 
                                                             | 
                                                        
                    |
| 9 | 53 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| 10 | 155 | 
                                                                 
                                    
                                    10.7%
                                 
                                                             | 
                                                        
                    |
| 11 | 35 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 12 | 56 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    |
| 13 | 32 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 14 | 45 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 15 | 112 | 
                                                                 
                                    
                                    7.7%
                                 
                                                             | 
                                                        
                    |
| 16 | 25 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 17 | 31 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 18 | 38 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    |
| 19 | 29 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 20 | 111 | 
                                                                 
                                    
                                    7.7%
                                 
                                                             | 
                                                        
                    |
| 21 | 8 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 22 | 13 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| 23 | 6 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 24 | 15 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 25 | 42 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 26 | 11 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 27 | 7 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 28 | 8 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 29 | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 30 | 35 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 31 | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 32 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 33 | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 34 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 35 | 7 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 36 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 37 | 11 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 38 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 39 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 40 | 13 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| 41 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 42 | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 43 | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 44 | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 45 | 7 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 47 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 48 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 50 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 52 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 54 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 56 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 58 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 59 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             |