| Value |
Category |
| 0 |
N.A. None at school. |
| 1 |
Extremely dirty |
| 2 |
Very dirty |
| 3 |
A little dirty |
| 4 |
Clean |
| 5 |
Very clean |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.