| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 206 |
40.7%
|
|
| 2014 | 128 |
25.3%
|
|
| 2015 | 100 |
19.8%
|
|
| 2016 | 37 |
7.3%
|
|
| 2017 | 13 |
2.6%
|
|
| 2018 | 2 |
0.4%
|
|
| Missing value | 20 |
4%
|