| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 292 | 
                                    
                                    21.5%
                                 | 
| 1 | Once or twice | 401 | 
                                    
                                    29.6%
                                 | 
| 2 | More often | 663 | 
                                    
                                    48.9%
                                 |