| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 831 | 
                                    
                                    69.3%
                                 | 
| 1 | Just once or twice | 131 | 
                                    
                                    10.9%
                                 | 
| 2 | Several times | 124 | 
                                    
                                    10.3%
                                 | 
| 3 | Many times | 57 | 
                                    
                                    4.8%
                                 | 
| 4 | Always | 57 | 
                                    
                                    4.8%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don’t know | 0 | 
                                    
                                    0%
                                 |