| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 960 |
8.5%
|
|
| 2006 | 2299 |
20.4%
|
|
| 2007 | 2291 |
20.3%
|
|
| 2008 | 2208 |
19.6%
|
|
| 2009 | 2155 |
19.1%
|
|
| 2010 | 1197 |
10.6%
|
|
| Sysmiss | 163 |