| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 15 minutes | 150 |
15.1%
|
| 2 | 15 to 30minutes | 253 |
25.5%
|
| 3 | 30 to an hour | 351 |
35.3%
|
| 4 | From 1 to 3 hrs | 178 |
17.9%
|
| 5 | More than 3hrs | 62 |
6.2%
|
| Sysmiss | 2974 |