| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 3 |
0.3%
|
|
| 2017 | 79 |
7.2%
|
|
| 2018 | 93 |
8.5%
|
|
| 2019 | 88 |
8%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 832 |
75.9%
|