| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 973 | 
                                    
                                    81.1%
                                 | 
| 1 | Only once | 81 | 
                                    
                                    6.8%
                                 | 
| 2 | A few times | 102 | 
                                    
                                    8.5%
                                 | 
| 3 | Often | 44 | 
                                    
                                    3.7%
                                 | 
| 9 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |