| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 hr | 162 |
27.6%
|
| 2 | 1-2 hrs | 211 |
36%
|
| 3 | 2-3 hrs | 125 |
21.3%
|
| 4 | 3-4 hrs | 50 |
8.5%
|
| 5 | 4-6 hrs | 24 |
4.1%
|
| 6 | 6-8 hrs | 8 |
1.4%
|
| 7 | more than 8 hrs | 6 |
1%
|
| 98 | Missing response | 509 | |
| 99 | Not applicable | 15939 |