| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 163 |
7%
|
|
| 2012 | 415 |
17.8%
|
|
| 2013 | 472 |
20.3%
|
|
| 2014 | 508 |
21.8%
|
|
| 2015 | 519 |
22.3%
|
|
| 2016 | 250 |
10.7%
|
|
| Sysmiss | 3709 |