| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 1 |
0.1%
|
|
| 2017 | 50 |
3.2%
|
|
| 2018 | 197 |
12.6%
|
|
| 2019 | 9 |
0.6%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 1306 |
83.5%
|