| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15 minutes or less | 1367 |
16.1%
|
| 2 | More than 15 to 30 minutes | 775 |
9.1%
|
| 3 | More than 30 minutes to an hour | 796 |
9.4%
|
| 4 | More than an hour | 1267 |
14.9%
|
| 5 | Don't know | 4274 |
50.4%
|
| Sysmiss | 92 |