| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 11 |
6.1%
|
|
| 2005 | 9 |
5%
|
|
| 2006 | 28 |
15.5%
|
|
| 2007 | 53 |
29.3%
|
|
| 2008 | 29 |
16%
|
|
| 2009 | 48 |
26.5%
|
|
| 2010 | 2 |
1.1%
|
|
| 2013 | 1 |
0.6%
|
|
| Sysmiss | 286 |