| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| -8 | Refusal (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | One year or less | 48 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    
| 2 | 60 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    |
| 3 | 53 | 
                                                                 
                                    
                                    9.2%
                                 
                                                             | 
                                                        
                    |
| 4 | 32 | 
                                                                 
                                    
                                    5.6%
                                 
                                                             | 
                                                        
                    |
| 5 | 38 | 
                                                                 
                                    
                                    6.6%
                                 
                                                             | 
                                                        
                    |
| 6 | 43 | 
                                                                 
                                    
                                    7.5%
                                 
                                                             | 
                                                        
                    |
| 7 | 32 | 
                                                                 
                                    
                                    5.6%
                                 
                                                             | 
                                                        
                    |
| 8 | 38 | 
                                                                 
                                    
                                    6.6%
                                 
                                                             | 
                                                        
                    |
| 9 | 25 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 10 | 31 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    |
| 11 | 17 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 12 | 19 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 13 | 18 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 14 | 12 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 15 | 18 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 16 | 5 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| 17 | 8 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 18 | 8 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 19 | 11 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 20 | 17 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 21 | 6 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 22 | 13 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 23 | 2 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 24 | 2 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 25 | 3 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 26 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 27 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 29 | 2 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 30 | 2 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 32 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 34 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 35 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 37 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 50 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 56 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 64 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 6 |