| Value |
Category |
| 1 |
Less than 15 minutes |
| 2 |
15-30 minutes |
| 3 |
More than 30 minutes |
| 4 |
Do not know |
| 8 |
Not applicable |
| 9 |
Unspecified |
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.