| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 278 |
27.6%
|
|
| 2011 | 293 |
29%
|
|
| 2012 | 267 |
26.5%
|
|
| 2013 | 146 |
14.5%
|
|
| 2014 | 19 |
1.9%
|
|
| 2015 | 6 |
0.6%
|
|
| Sysmiss | 4385 |