| Value |
Category |
| 1 |
<1 hr |
| 2 |
1-2 hrs. |
| 3 |
2-3 hrs. |
| 4 |
>3 hrs. |
| 6 |
not applicable |
| 8 |
not admin. |
| 9 |
missing |
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.