| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 19 |
1.7%
|
|
| 2017 | 97 |
8.9%
|
|
| 2018 | 110 |
10%
|
|
| 2019 | 120 |
10.9%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 749 |
68.3%
|