| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not received | 0 |
0%
|
| 2008 | 4 |
1%
|
|
| 2009 | 8 |
2%
|
|
| 2010 | 16 |
4%
|
|
| 2011 | 13 |
3.2%
|
|
| 2012 | 74 |
18.4%
|
|
| 4444 | No date recorded | 87 |
21.6%
|
| 6666 | Mother's report | 201 |
49.9%
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 30 |