| Value |
Category |
| 1 |
Never |
| 2 |
Once a term |
| 3 |
Once a month |
| 4 |
Once a week |
| 5 |
Nearly every day |
| 98 |
Other |
| 99 |
No books |
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.