| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 515 |
2.4%
|
| 2014 | 528 |
2.5%
|
|
| 2015 | 1296 |
6.1%
|
|
| 2016 | 2210 |
10.3%
|
|
| 2017 | 435 |
2%
|
|
| 4444 | Marked on card | 40 |
0.2%
|
| 6666 | Mother reported | 2 |
0%
|
| 9997 | Inconsistent | 16 |
0.1%
|
| 9998 | DK | 1 |
0%
|
| 9999 | Missing | 2 |
0%
|
| Sysmiss | 16314 |
76.4%
|