| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0.1%
|
|
| 2015 | 35 |
2.6%
|
|
| 2016 | 609 |
45.4%
|
|
| 2017 | 441 |
32.9%
|
|
| 2018 | 254 |
19%
|
|
| 4444 | Marked on card | 0 |
0%
|
| 6666 | Mother reported | 0 |
0%
|
| 9999 | No response | 0 |
0%
|
| Sysmiss | 3314 |