| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 66 |
1.1%
|
|
| 2017 | 896 |
14.4%
|
|
| 2018 | 935 |
15%
|
|
| 2019 | 129 |
2.1%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 4191 |
67.3%
|