| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 2 |
0.1%
|
|
| 2017 | 46 |
2.9%
|
|
| 2018 | 163 |
10.4%
|
|
| 2019 | 7 |
0.4%
|
|
| 9999 | NO RESPONSE | 2 |
0.1%
|
| Sysmiss | 1344 |
85.9%
|