| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 1 |
0.2%
|
|
| 2014 | 1 |
0.2%
|
|
| 2015 | 361 |
89.6%
|
|
| 2016 | 26 |
6.5%
|
|
| 2017 | 14 |
3.5%
|
|
| Sysmiss | 603 |