| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 85 |
0.5%
|
|
| 2017 | 669 |
3.7%
|
|
| 2018 | 917 |
5%
|
|
| 2019 | 31 |
0.2%
|
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 16609 |
90.7%
|