| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 15minutes | 156 |
78.8%
|
| 2 | Less than 30minutes | 31 |
15.7%
|
| 3 | 1 to 2hrs | 10 |
5.1%
|
| 4 | More than 2hrs | 1 |
0.5%
|
| Sysmiss | 3778 |