| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 569 |
82.2%
|
| 2 | Twice a week | 45 |
6.5%
|
| 3 | Once a week | 47 |
6.8%
|
| 6 | Others | 31 |
4.5%
|
| Sysmiss | 10224 |