| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 193 |
71.7%
|
|
| 2013 | 29 |
10.8%
|
|
| 2014 | 5 |
1.9%
|
|
| 2015 | 6 |
2.2%
|
|
| 2016 | 5 |
1.9%
|
|
| 2017 | 7 |
2.6%
|
|
| 2018 | 4 |
1.5%
|
|
| Missing value | 20 |
7.4%
|