| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1999- | 9 |
23.1%
|
| 1 | 2006- | 9 |
23.1%
|
| 2 | 2008- | 9 |
23.1%
|
| 3 | 2010- | 12 |
30.8%
|
| 4 | 2011- | 0 |
0%
|
| Sysmiss | 2 |