| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 12 |
1.1%
|
|
| 2013 | 46 |
4.2%
|
|
| 2014 | 92 |
8.4%
|
|
| 2015 | 211 |
19.2%
|
|
| 2016 | 480 |
43.7%
|
|
| 2017 | 257 |
23.4%
|
|
| Sysmiss | 1642 |