| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 1 |
0.1%
|
|
| 2013 | 1 |
0.1%
|
|
| 2014 | 5 |
0.7%
|
|
| 2015 | 12 |
1.7%
|
|
| 2016 | 33 |
4.7%
|
|
| 2017 | 188 |
26.7%
|
|
| 2018 | 463 |
65.9%
|
|
| Sysmiss | 6081 |