| Value | Category | Cases | |
|---|---|---|---|
| 1 | Months and years | 2040 | 
                                    
                                    46.1%
                                 | 
| 2 | Until now | 2265 | 
                                    
                                    51.2%
                                 | 
| 8 | DK | 119 | 
                                    
                                    2.7%
                                 | 
| Sysmiss | 21884 |