| Value | Category | Cases | |
|---|---|---|---|
| 0 | NOT GIVEN | 235 |
3.7%
|
| 2015 | 13 |
0.2%
|
|
| 2016 | 752 |
12%
|
|
| 2017 | 747 |
11.9%
|
|
| 2018 | 737 |
11.8%
|
|
| 4444 | MARKED ON CARD | 30 |
0.5%
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 3754 |
59.9%
|