| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 2 |
0.1%
|
|
| 2017 | 119 |
4.1%
|
|
| 2018 | 416 |
14.2%
|
|
| 2019 | 265 |
9.1%
|
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 2122 |
72.5%
|