| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 7 |
1.9%
|
|
| 2012 | 78 |
20.9%
|
|
| 2013 | 74 |
19.8%
|
|
| 2014 | 73 |
19.5%
|
|
| 2015 | 80 |
21.4%
|
|
| 2016 | 62 |
16.6%
|
|
| Sysmiss | 5 |