| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 3 |
0%
|
|
| 2017 | 250 |
4%
|
|
| 2018 | 799 |
12.8%
|
|
| 2019 | 93 |
1.5%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 5072 |
81.5%
|