| Value | Category | Cases | |
|---|---|---|---|
| 0 | NOT GIVEN | 76 |
2.2%
|
| 2015 | 2 |
0.1%
|
|
| 2016 | 9 |
0.3%
|
|
| 2017 | 16 |
0.5%
|
|
| 2018 | 8 |
0.2%
|
|
| 4444 | MARKED ON CARD | 2 |
0.1%
|
| Sysmiss | 3361 |
96.7%
|