| Value | Category | Cases | |
|---|---|---|---|
| 0 | NOT GIVEN | 940 |
27.1%
|
| 2015 | 28 |
0.8%
|
|
| 2016 | 123 |
3.5%
|
|
| 2017 | 304 |
8.8%
|
|
| 2018 | 118 |
3.4%
|
|
| 4444 | MARKED ON CARD | 27 |
0.8%
|
| 9998 | 1 |
0%
|
|
| Sysmiss | 1933 |
55.6%
|