| Value | Category | Cases | |
|---|---|---|---|
| 0 | not at all | 4161 | 
                                    
                                    50.5%
                                 | 
| 1 | less than once a week | 2445 | 
                                    
                                    29.7%
                                 | 
| 2 | at least once a week | 1631 | 
                                    
                                    19.8%
                                 | 
| 3 | almost every day | 0 | 
                                    
                                    0%
                                 | 
| 9 | 2 | 
                                    
                                    0%
                                 |