| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1.Never | 40 | 
                                
                                1.6%
                             | 
| 2 | 2.Once a week | 233 | 
                                
                                9.6%
                             | 
| 3 | 3.Three times a week | 539 | 
                                
                                22.1%
                             | 
| 4 | 4.More than 3 times a week | 1623 | 
                                
                                66.6%
                             | 
| 5 | 5.Missing | 1 | 
                                
                                0%
                             |