| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 811 | 
                                    
                                    67.6%
                                 | 
| 1 | Only once | 66 | 
                                    
                                    5.5%
                                 | 
| 2 | A few times | 170 | 
                                    
                                    14.2%
                                 | 
| 3 | Often | 140 | 
                                    
                                    11.7%
                                 | 
| 9 | Don't know | 13 | 
                                    
                                    1.1%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |