| Value | Category | Cases | |
|---|---|---|---|
| 0 | NOT GIVEN | 900 |
14.4%
|
| 2016 | 273 |
4.4%
|
|
| 2017 | 732 |
11.7%
|
|
| 2018 | 591 |
9.4%
|
|
| 4444 | MARKED ON CARD | 19 |
0.3%
|
| Sysmiss | 3754 |
59.9%
|