| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 28 |
1%
|
|
| 2017 | 330 |
11.3%
|
|
| 2018 | 465 |
15.9%
|
|
| 2019 | 358 |
12.2%
|
|
| 9999 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 1740 |
59.5%
|