| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 14 | 
                                    
                                    0.1%
                                 | 
| 0 | Never | 3245 | 
                                    
                                    12.8%
                                 | 
| 1 | Rarely | 6856 | 
                                    
                                    27%
                                 | 
| 2 | Often | 8515 | 
                                    
                                    33.5%
                                 | 
| 3 | Always | 5350 | 
                                    
                                    21.1%
                                 | 
| 9 | Don't know | 1417 | 
                                    
                                    5.6%
                                 | 
| 998 | Refused | 0 | 
                                    
                                    0%
                                 |