| Value | Category | Cases | |
|---|---|---|---|
| 1 | half hour or less | 1202 |
11.2%
|
| 2 | over half hour to 1 hour | 1979 |
18.5%
|
| 3 | over 1 hour to 2 hours | 1957 |
18.3%
|
| 4 | over 2 hours | 4863 |
45.5%
|
| 9 | no response | 696 |
6.5%
|
| Sysmiss | 1 |