| Value | Category |
|---|---|
| 1 | all attend school............100 |
| 2 | almost all.........................90 |
| 3 | more than half, but not all.....75 |
| 4 | half of them...................50 |
| 5 | less than half........................33 1/3 |
| 6 | only a few..........................10 |
| 7 | none.............................0 |
| Sysmiss |