| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 40 |
0.6%
|
|
| 2018 | 480 |
7.5%
|
|
| 2019 | 878 |
13.7%
|
|
| 2020 | 7 |
0.1%
|
|
| 9999 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 4985 |
78%
|