| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 35 |
15.8%
|
|
| 2008 | 39 |
17.6%
|
|
| 2009 | 43 |
19.5%
|
|
| 2010 | 57 |
25.8%
|
|
| 2011 | 45 |
20.4%
|
|
| 2012 | 2 |
0.9%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 539 |