| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 513 |
72.1%
|
|
| 2009 | 150 |
21.1%
|
|
| 2010 | 39 |
5.5%
|
|
| 2011 | 4 |
0.6%
|
|
| 2012 | 4 |
0.6%
|
|
| 2013 | 1 |
0.1%
|
|
| 2018 | 1 |
0.1%
|
|
| Sysmiss | 471 |