| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 1072 |
3.4%
|
| 2011 | 135 |
0.4%
|
|
| 2012 | 1878 |
6%
|
|
| 2013 | 3117 |
10%
|
|
| 2014 | 2336 |
7.5%
|
|
| 4444 | Marked on card | 93 |
0.3%
|
| 6666 | Mother reported | 29 |
0.1%
|
| 9997 | Inconsistent | 20 |
0.1%
|
| 9999 | Missing | 4 |
0%
|
| Sysmiss | 22399 |
72.1%
|