| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 9 |
1.3%
|
|
| 2017 | 88 |
12.5%
|
|
| 2018 | 90 |
12.8%
|
|
| 2019 | 8 |
1.1%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 507 |
72.1%
|