| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 | 
                                    
                                    0.6%
                                 | 
| 1 | One year or less | 12 | 
                                    
                                    0.8%
                                 | 
| 2 | 4 | 
                                    
                                    0.3%
                                 | |
| 3 | 17 | 
                                    
                                    1.2%
                                 | |
| 4 | 8 | 
                                    
                                    0.6%
                                 | |
| 5 | 24 | 
                                    
                                    1.7%
                                 | |
| 6 | 8 | 
                                    
                                    0.6%
                                 | |
| 7 | 8 | 
                                    
                                    0.6%
                                 | |
| 8 | 17 | 
                                    
                                    1.2%
                                 | |
| 9 | 6 | 
                                    
                                    0.4%
                                 | |
| 10 | 88 | 
                                    
                                    6.2%
                                 | |
| 11 | 9 | 
                                    
                                    0.6%
                                 | |
| 12 | 23 | 
                                    
                                    1.6%
                                 | |
| 13 | 15 | 
                                    
                                    1.1%
                                 | |
| 14 | 9 | 
                                    
                                    0.6%
                                 | |
| 15 | 114 | 
                                    
                                    8.1%
                                 | |
| 16 | 11 | 
                                    
                                    0.8%
                                 | |
| 17 | 25 | 
                                    
                                    1.8%
                                 | |
| 18 | 39 | 
                                    
                                    2.8%
                                 | |
| 19 | 11 | 
                                    
                                    0.8%
                                 | |
| 20 | 153 | 
                                    
                                    10.8%
                                 | |
| 21 | 11 | 
                                    
                                    0.8%
                                 | |
| 22 | 22 | 
                                    
                                    1.6%
                                 | |
| 23 | 10 | 
                                    
                                    0.7%
                                 | |
| 24 | 21 | 
                                    
                                    1.5%
                                 | |
| 25 | 147 | 
                                    
                                    10.4%
                                 | |
| 26 | 19 | 
                                    
                                    1.3%
                                 | |
| 27 | 15 | 
                                    
                                    1.1%
                                 | |
| 28 | 19 | 
                                    
                                    1.3%
                                 | |
| 29 | 3 | 
                                    
                                    0.2%
                                 | |
| 30 | 181 | 
                                    
                                    12.8%
                                 | |
| 31 | 4 | 
                                    
                                    0.3%
                                 | |
| 32 | 16 | 
                                    
                                    1.1%
                                 | |
| 33 | 8 | 
                                    
                                    0.6%
                                 | |
| 34 | 4 | 
                                    
                                    0.3%
                                 | |
| 35 | 95 | 
                                    
                                    6.7%
                                 | |
| 36 | 1 | 
                                    
                                    0.1%
                                 | |
| 37 | 6 | 
                                    
                                    0.4%
                                 | |
| 38 | 7 | 
                                    
                                    0.5%
                                 | |
| 39 | 1 | 
                                    
                                    0.1%
                                 | |
| 40 | 116 | 
                                    
                                    8.2%
                                 | |
| 42 | 4 | 
                                    
                                    0.3%
                                 | |
| 43 | 5 | 
                                    
                                    0.4%
                                 | |
| 44 | 3 | 
                                    
                                    0.2%
                                 | |
| 45 | 37 | 
                                    
                                    2.6%
                                 | |
| 46 | 1 | 
                                    
                                    0.1%
                                 | |
| 47 | 1 | 
                                    
                                    0.1%
                                 | |
| 48 | 1 | 
                                    
                                    0.1%
                                 | |
| 49 | 1 | 
                                    
                                    0.1%
                                 | |
| 50 | 35 | 
                                    
                                    2.5%
                                 | |
| 52 | 1 | 
                                    
                                    0.1%
                                 | |
| 53 | 2 | 
                                    
                                    0.1%
                                 | |
| 54 | 1 | 
                                    
                                    0.1%
                                 | |
| 55 | 2 | 
                                    
                                    0.1%
                                 | |
| 57 | 2 | 
                                    
                                    0.1%
                                 | |
| 60 | 1 | 
                                    
                                    0.1%
                                 | |
| 65 | 2 | 
                                    
                                    0.1%
                                 | |
| 70 | 1 | 
                                    
                                    0.1%
                                 |