| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 9 |
1.3%
|
|
| 2017 | 89 |
12.7%
|
|
| 2018 | 92 |
13.1%
|
|
| 2019 | 7 |
1%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 505 |
71.8%
|