| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 793 |
12.4%
|
|
| 2018 | 1054 |
16.5%
|
|
| 2019 | 1128 |
17.6%
|
|
| 2020 | 8 |
0.1%
|
|
| 9999 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 3407 |
53.3%
|