| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 23 |
1.8%
|
|
| 2012 | 36 |
2.9%
|
|
| 2013 | 62 |
5%
|
|
| 2014 | 330 |
26.4%
|
|
| 2015 | 499 |
39.9%
|
|
| 2016 | 302 |
24.1%
|
|
| Sysmiss | 4784 |