| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1950 to 1959 | 2 |
0.8%
|
| 2 | 1960 to 1969 | 3 |
1.2%
|
| 3 | 1970 to 1979 | 14 |
5.4%
|
| 4 | 1980 to 1989 | 44 |
17.1%
|
| 5 | 1990 to 1999 | 124 |
48.1%
|
| 6 | 2000 + | 71 |
27.5%
|
| Sysmiss | 3 |