| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 892 | 
                                    
                                    74.3%
                                 | 
| 1 | Once or twice | 167 | 
                                    
                                    13.9%
                                 | 
| 2 | A few times | 99 | 
                                    
                                    8.3%
                                 | 
| 3 | Often | 42 | 
                                    
                                    3.5%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 0 | 
                                    
                                    0%
                                 |