| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 17 |
1.3%
|
|
| 2014 | 248 |
19.7%
|
|
| 2015 | 102 |
8.1%
|
|
| 2016 | 22 |
1.7%
|
|
| 2017 | 15 |
1.2%
|
|
| 2018 | 18 |
1.4%
|
|
| Missing value | 839 |
66.5%
|