| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 806 |
12.6%
|
|
| 2018 | 1143 |
17.9%
|
|
| 2019 | 1124 |
17.6%
|
|
| 2020 | 8 |
0.1%
|
|
| 9999 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 3309 |
51.8%
|