| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not weighed | 5349 |
67.5%
|
| 1 | From card | 409 |
5.2%
|
| 2 | From recall | 2068 |
26.1%
|
| 9 | Special answers | 96 |
1.2%
|
| Sysmiss | 19680 |