| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 294 |
10%
|
|
| 2012 | 488 |
16.6%
|
|
| 2013 | 569 |
19.4%
|
|
| 2014 | 565 |
19.2%
|
|
| 2015 | 639 |
21.7%
|
|
| 2016 | 385 |
13.1%
|
|
| Sysmiss | 3096 |