| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 135 |
7.7%
|
|
| 2013 | 383 |
21.8%
|
|
| 2014 | 469 |
26.7%
|
|
| 2015 | 461 |
26.2%
|
|
| 2016 | 309 |
17.6%
|
|
| Sysmiss | 4279 |