| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 614 |
63.8%
|
| 2 | Twice a week | 41 |
4.3%
|
| 3 | Once a week | 81 |
8.4%
|
| 6 | Others | 225 |
23.4%
|
| 7 | 1 |
0.1%
|
|
| Sysmiss | 9954 |