| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 312 | 
                                    
                                    26%
                                 | 
| 1 | Occasionally | 685 | 
                                    
                                    57.1%
                                 | 
| 2 | Frequently | 202 | 
                                    
                                    16.8%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 1 | 
                                    
                                    0.1%
                                 |