| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15 minutes or less | 2072 |
24.4%
|
| 2 | More than 15 to 30 minutes | 1453 |
17.1%
|
| 3 | More than 30 minutes to an hour | 1149 |
13.6%
|
| 4 | More than an hour | 2244 |
26.5%
|
| 5 | Don't know | 1561 |
18.4%
|
| Sysmiss | 92 |