| Value |
Category |
| 1 |
More than 1 per mo |
| 2 |
Once per month |
| 3 |
Once each 2 mos |
| 4 |
Once each 6 mos |
| 5 |
Seldom |
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.