| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1972- | 8 |
20.5%
|
| 1 | 1993- | 10 |
25.6%
|
| 2 | 2002- | 8 |
20.5%
|
| 3 | 2007- | 13 |
33.3%
|
| 4 | 2010- | 0 |
0%
|
| Sysmiss | 1 |