| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15 minutes or less | 890 |
10.5%
|
| 2 | More than 15 to 30 minutes | 842 |
9.9%
|
| 3 | More than 30 minutes to an hour | 967 |
11.4%
|
| 4 | More than an hour | 1659 |
19.6%
|
| 5 | Don't know | 4121 |
48.6%
|
| Sysmiss | 92 |