| Value | Category | Cases | |
|---|---|---|---|
| 0 | NOT GIVEN | 459 |
13.2%
|
| 2015 | 88 |
2.5%
|
|
| 2016 | 459 |
13.2%
|
|
| 2017 | 460 |
13.2%
|
|
| 2018 | 62 |
1.8%
|
|
| 4444 | MARKED ON CARD | 10 |
0.3%
|
| 9997 | 2 |
0.1%
|
|
| 9998 | 1 |
0%
|
|
| Sysmiss | 1933 |
55.6%
|