| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 919 |
14.4%
|
|
| 2018 | 1177 |
18.4%
|
|
| 2019 | 1132 |
17.7%
|
|
| 2020 | 4 |
0.1%
|
|
| 9999 | NO RESPONSE | 5 |
0.1%
|
| Sysmiss | 3157 |
49.4%
|