| Value |
Category |
| 1 |
DAILY AT CERTAIN HOURS |
| 2 |
DAILY FOR 24 HOURS A DAY |
| 3 |
ONE OR TWO DAYS A WEEK |
| 4 |
THREE TO FIVE DAYS A WEEK |
| 5 |
LESS THAN ONCE A WEEK |
| Sysmiss |
|
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.