| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1900- | 18 |
14%
|
| 1 | 1980- | 32 |
24.8%
|
| 2 | 1991- | 24 |
18.6%
|
| 3 | 2000- | 25 |
19.4%
|
| 4 | 2005- | 30 |
23.3%
|
| 5 | 2010- | 0 |
0%
|
| Sysmiss | 11 |