| Value | Category | Cases | |
|---|---|---|---|
| 1 | once a month | 36 |
25.9%
|
| 2 | 2-3 days a month | 19 |
13.7%
|
| 3 | about once a week | 17 |
12.2%
|
| 4 | 2-3 days a week | 17 |
12.2%
|
| 5 | 4-6 days a week | 6 |
4.3%
|
| 6 | everyday | 10 |
7.2%
|
| 7 | not use in the past 30 days | 31 |
22.3%
|
| 8 | don?t know | 3 |
2.2%
|
| Sysmiss | 38643 |