| Value |
Category |
| 1 |
Day |
| 2 |
Week |
| 3 |
Two-week |
| 4 |
Month |
| 5 |
Trimester |
| 6 |
Semester |
| 7 |
Year |
| 8 |
Once |
| 77 |
Inap |
| 88 |
Do not know |
| 99 |
No response |
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.