| Value |
Category |
| 1 |
1 Less than 10 minutes |
| 2 |
2 10 to 20 minutes |
| 3 |
3 20 to 30 minutes |
| 4 |
4 More than 30 minutes |
| 98 |
98 Don't know |
| 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.