| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 43 |
0.7%
|
|
| 2018 | 861 |
13.5%
|
|
| 2019 | 1117 |
17.5%
|
|
| 2020 | 6 |
0.1%
|
|
| 9999 | NO RESPONSE | 7 |
0.1%
|
| Sysmiss | 4360 |
68.2%
|