| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 6 | 
                                    
                                    0%
                                 | 
| 0 | Never | 9142 | 
                                    
                                    36%
                                 | 
| 1 | Only sometimes | 7808 | 
                                    
                                    30.7%
                                 | 
| 2 | Often | 3678 | 
                                    
                                    14.5%
                                 | 
| 3 | Always | 2067 | 
                                    
                                    8.1%
                                 | 
| 9 | Don't know | 2696 | 
                                    
                                    10.6%
                                 | 
| 998 | Refused | 0 | 
                                    
                                    0%
                                 |