| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 64 |
10.5%
|
| 2 | Less than an hour | 113 |
18.6%
|
| 3 | 1-2 hours | 243 |
40%
|
| 4 | 2-3 hours | 128 |
21.1%
|
| 5 | More than 3 hours | 60 |
9.9%
|
| Sysmiss | 275 |