| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 85 |
0.4%
|
| 2014 | 683 |
3.2%
|
|
| 2015 | 1452 |
6.8%
|
|
| 2016 | 2352 |
11%
|
|
| 2017 | 421 |
2%
|
|
| 4444 | Marked on card | 30 |
0.1%
|
| 6666 | Mother reported | 3 |
0%
|
| 9997 | Inconsistent | 19 |
0.1%
|
| Sysmiss | 16314 |
76.4%
|