| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1960-1969 | 9 | 
                                    
                                    0.4%
                                 | 
| 2 | 1970-1979 | 57 | 
                                    
                                    2.7%
                                 | 
| 3 | 1980-1989 | 131 | 
                                    
                                    6.1%
                                 | 
| 4 | 1990-1999 | 317 | 
                                    
                                    14.8%
                                 | 
| 5 | 2000-2005 | 461 | 
                                    
                                    21.5%
                                 | 
| 6666 | Trifft nicht zu | 1161 | 
                                    
                                    54.2%
                                 | 
| 8888 | Weiss nicht | 4 | 
                                    
                                    0.2%
                                 | 
| 9999 | Keine Angabe | 1 | 
                                    
                                    0%
                                 |