| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 270 |
29.3%
|
|
| 2009 | 627 |
68.2%
|
|
| 2010 | 17 |
1.8%
|
|
| 9999 | Missing | 6 |
0.7%
|
| Sysmiss | 12667 |