| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 601 |
9.4%
|
|
| 2018 | 991 |
15.5%
|
|
| 2019 | 1129 |
17.7%
|
|
| 2020 | 10 |
0.2%
|
|
| 9999 | NO RESPONSE | 7 |
0.1%
|
| Sysmiss | 3656 |
57.2%
|