| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 27 |
0.9%
|
|
| 2017 | 326 |
11.1%
|
|
| 2018 | 441 |
15.1%
|
|
| 2019 | 350 |
12%
|
|
| 9999 | NO RESPONSE | 5 |
0.2%
|
| Sysmiss | 1776 |
60.7%
|