| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 453 |
75%
|
|
| 2016 | 124 |
20.5%
|
|
| 2017 | 20 |
3.3%
|
|
| 2018 | 6 |
1%
|
|
| 2019 | 1 |
0.2%
|
|
| Sysmiss | 296 |