| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 17 |
7.8%
|
|
| 2008 | 41 |
18.8%
|
|
| 2009 | 42 |
19.3%
|
|
| 2010 | 62 |
28.4%
|
|
| 2011 | 54 |
24.8%
|
|
| 2012 | 2 |
0.9%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 410 |