| Value | Category | Cases | |
|---|---|---|---|
| 0 | NOT GIVEN | 0 |
0%
|
| 2015 | 128 |
6.9%
|
|
| 2016 | 628 |
33.7%
|
|
| 2017 | 584 |
31.3%
|
|
| 2018 | 522 |
28%
|
|
| 4444 | MARKED ON CARD | 0 |
0%
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 1689 |