| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15 minutes or less | 206 |
31.9%
|
| 2 | 16–30 minutes | 338 |
52.4%
|
| 3 | 31–60 minutes | 94 |
14.6%
|
| 4 | More than 60 minutes | 7 |
1.1%
|
| Sysmiss | 355 |