| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 8 |
0.1%
|
|
| 2017 | 193 |
3.1%
|
|
| 2018 | 702 |
11.3%
|
|
| 2019 | 82 |
1.3%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 5232 |
84.1%
|