| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 424 | 
                                    
                                    35.3%
                                 | 
| 1 | Just once or twice | 267 | 
                                    
                                    22.3%
                                 | 
| 2 | Several times | 242 | 
                                    
                                    20.2%
                                 | 
| 3 | Many times | 167 | 
                                    
                                    13.9%
                                 | 
| 4 | Always | 99 | 
                                    
                                    8.3%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't Know | 1 | 
                                    
                                    0.1%
                                 |