| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 266 |
10.4%
|
|
| 2005 | 248 |
9.7%
|
|
| 2006 | 270 |
10.5%
|
|
| 2007 | 224 |
8.8%
|
|
| 2008 | 228 |
8.9%
|
|
| 2009 | 224 |
8.8%
|
|
| 2010 | 243 |
9.5%
|
|
| 2011 | 226 |
8.8%
|
|
| 2012 | 164 |
6.4%
|
|
| 2013 | 164 |
6.4%
|
|
| 2014 | 156 |
6.1%
|
|
| 2015 | 147 |
5.7%
|
|
| Sysmiss | 4 |