| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 15minutes | 482 |
73.7%
|
| 2 | Less than 30minutes | 120 |
18.3%
|
| 3 | 1 to 2hrs | 40 |
6.1%
|
| 4 | More than 2hrs | 12 |
1.8%
|
| Sysmiss | 3322 |