| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 723 | 
                                    
                                    60.3%
                                 | 
| 1 | Just once or twice | 143 | 
                                    
                                    11.9%
                                 | 
| 2 | Several times | 164 | 
                                    
                                    13.7%
                                 | 
| 3 | Many times | 102 | 
                                    
                                    8.5%
                                 | 
| 4 | Always | 66 | 
                                    
                                    5.5%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 2 | 
                                    
                                    0.2%
                                 |