| Value | Category | Cases | |
|---|---|---|---|
| 1 | less than 15 minutes | 3232 |
58.7%
|
| 2 | 15-30 mins | 1324 |
24.1%
|
| 3 | 30-60 mins | 548 |
10%
|
| 4 | 1-2 hours | 315 |
5.7%
|
| 5 | over 2 hours | 83 |
1.5%
|
| Sysmiss | 814 |