| Value | Category | Cases | |
|---|---|---|---|
| 1 | Several Times a day | 1 |
0.5%
|
| 2 | Once in a day | 1 |
0.5%
|
| 3 | Several times a week | 3 |
1.4%
|
| 4 | Once a week | 1 |
0.5%
|
| 5 | Less than once a month | 22 |
10.2%
|
| 6 | Never | 181 |
83.8%
|
| 95 | Missing | 2 |
0.9%
|
| 96 | Others | 5 |
2.3%
|