| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 13 |
1.2%
|
|
| 2012 | 229 |
20.5%
|
|
| 2013 | 236 |
21.1%
|
|
| 2014 | 251 |
22.5%
|
|
| 2015 | 198 |
17.7%
|
|
| 2016 | 191 |
17.1%
|
|
| Sysmiss | 5 |