| Value | Category | Cases | |
|---|---|---|---|
| 0 | NOT GIVEN | 62 |
1.8%
|
| 2015 | 7 |
0.2%
|
|
| 2016 | 17 |
0.5%
|
|
| 2017 | 16 |
0.5%
|
|
| 2018 | 10 |
0.3%
|
|
| 4444 | MARKED ON CARD | 1 |
0%
|
| Sysmiss | 3361 |
96.7%
|