| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 2 |
0.1%
|
|
| 2012 | 20 |
1.4%
|
|
| 2013 | 61 |
4.3%
|
|
| 2014 | 125 |
8.8%
|
|
| 2015 | 319 |
22.5%
|
|
| 2016 | 640 |
45.2%
|
|
| 2017 | 250 |
17.6%
|
|
| Sysmiss | 1323 |