| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 21 |
1%
|
|
| 2017 | 71 |
3.2%
|
|
| 2018 | 159 |
7.3%
|
|
| 2019 | 3 |
0.1%
|
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 1934 |
88.4%
|