| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 1 |
0.2%
|
|
| 2013 | 27 |
4.8%
|
|
| 2014 | 61 |
10.8%
|
|
| 2015 | 147 |
26.1%
|
|
| 2016 | 224 |
39.8%
|
|
| 2017 | 103 |
18.3%
|
|
| Sysmiss | 2177 |