| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15 minutes or less | 437 |
5.2%
|
| 2 | More than 15 to 30 minutes | 605 |
7.1%
|
| 3 | More than 30 minutes to an hour | 860 |
10.1%
|
| 4 | More than an hour | 1583 |
18.7%
|
| 5 | Don't know | 4994 |
58.9%
|
| Sysmiss | 92 |