| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15 minutes or less | 1139 |
13.4%
|
| 2 | More than 15 to 30 minutes | 1261 |
14.9%
|
| 3 | More than 30 minutes to an hour | 1701 |
20.1%
|
| 4 | More than an hour | 2622 |
30.9%
|
| 5 | Don't know | 1756 |
20.7%
|
| Sysmiss | 92 |