| Value | Category | Cases | |
|---|---|---|---|
| 0 | NOT GIVEN | 346 |
5.5%
|
| 2015 | 1 |
0%
|
|
| 2016 | 684 |
10.9%
|
|
| 2017 | 730 |
11.6%
|
|
| 2018 | 721 |
11.5%
|
|
| 4444 | MARKED ON CARD | 32 |
0.5%
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 3754 |
59.9%
|