| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1928- | 73 |
19.8%
|
| 1 | 1975- | 71 |
19.2%
|
| 2 | 1990- | 76 |
20.6%
|
| 3 | 1998- | 63 |
17.1%
|
| 4 | 2003- | 86 |
23.3%
|
| 5 | 2009- | 0 |
0%
|
| Sysmiss | 119 |