| Value |
Category |
| 0 |
no booklet was assigned |
| 1 |
booklet 1 |
| 2 |
booklet 2 |
| 3 |
booklet 3 |
| 4 |
booklet 4 |
| 5 |
booklet 5 |
| 6 |
booklet 6 |
| 7 |
booklet 7 |
| 8 |
booklet 8 |
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.