| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 1 |
0.1%
|
|
| 2017 | 230 |
16.7%
|
|
| 2018 | 229 |
16.6%
|
|
| 2019 | 204 |
14.8%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 713 |
51.7%
|