| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 81 | 
                                    
                                    6.8%
                                 | 
| 1 | Just once or twice | 19 | 
                                    
                                    1.6%
                                 | 
| 2 | Several times | 317 | 
                                    
                                    26.4%
                                 | 
| 3 | Many times | 389 | 
                                    
                                    32.4%
                                 | 
| 4 | Always | 392 | 
                                    
                                    32.7%
                                 | 
| 9 | Don't Know | 2 | 
                                    
                                    0.2%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |