| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 23 |
14%
|
|
| 2008 | 30 |
18.3%
|
|
| 2009 | 36 |
22%
|
|
| 2010 | 38 |
23.2%
|
|
| 2011 | 36 |
22%
|
|
| 2012 | 1 |
0.6%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 596 |