| Value | Category | Cases | |
|---|---|---|---|
| 2014 | 17 |
2.2%
|
|
| 2015 | 1 |
0.1%
|
|
| 2016 | 68 |
8.7%
|
|
| 2017 | 95 |
12.1%
|
|
| 2018 | 72 |
9.2%
|
|
| 2019 | 20 |
2.5%
|
|
| Missing value | 513 |
65.3%
|