| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 25 | 
                                    
                                    0.1%
                                 | 
| 0 | Never | 5451 | 
                                    
                                    21.5%
                                 | 
| 1 | Rarely | 5851 | 
                                    
                                    23%
                                 | 
| 2 | Often | 7015 | 
                                    
                                    27.6%
                                 | 
| 3 | Always | 4703 | 
                                    
                                    18.5%
                                 | 
| 9 | Don't know | 2352 | 
                                    
                                    9.3%
                                 | 
| 998 | Refused | 0 | 
                                    
                                    0%
                                 |