| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 4 |
1.1%
|
|
| 2012 | 35 |
9.6%
|
|
| 2013 | 126 |
34.6%
|
|
| 2014 | 82 |
22.5%
|
|
| 2015 | 89 |
24.5%
|
|
| 2016 | 28 |
7.7%
|
|
| Sysmiss | 12513 |