| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 3 hours each day | 11072 |
72.7%
|
| 2 | 3-4 hours | 3274 |
21.5%
|
| 3 | 5-6 hours | 733 |
4.8%
|
| 4 | 7-8 hours | 109 |
0.7%
|
| 5 | 9hours or more | 37 |
0.2%
|
| 98 | Missing response | 0 | |
| 99 | Not applicable | 1809 |