| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 434 |
84.6%
|
| 2014 | 1 |
0.2%
|
|
| 2015 | 9 |
1.8%
|
|
| 2016 | 35 |
6.8%
|
|
| 4444 | Marked on card | 13 |
2.5%
|
| 6666 | Mother reported | 18 |
3.5%
|
| 9998 | DK | 3 |
0.6%
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 610 |