| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 629 |
9.8%
|
|
| 2018 | 1113 |
17.4%
|
|
| 2019 | 1125 |
17.6%
|
|
| 2020 | 10 |
0.2%
|
|
| 9999 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 3513 |
54.9%
|