| Value |
Category |
| 1 |
all year |
| 2 |
last semester |
| 3 |
last 2 months |
| 4 |
last month |
| 5 |
intermittent |
| 6 |
summer vacation |
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.
