| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 721 | 
                                    
                                    60.1%
                                 | 
| 1 | Occasionally | 362 | 
                                    
                                    30.2%
                                 | 
| 2 | Frequently | 104 | 
                                    
                                    8.7%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 13 | 
                                    
                                    1.1%
                                 |