| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 20 |
0.9%
|
|
| 2017 | 74 |
3.4%
|
|
| 2018 | 166 |
7.6%
|
|
| 2019 | 3 |
0.1%
|
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 1925 |
87.9%
|