| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 5 | 
                                    
                                    0%
                                 | 
| 0 | Never | 6987 | 
                                    
                                    27.5%
                                 | 
| 1 | Once or twice | 1979 | 
                                    
                                    7.8%
                                 | 
| 2 | A few times | 2886 | 
                                    
                                    11.4%
                                 | 
| 3 | Often | 4689 | 
                                    
                                    18.5%
                                 | 
| 7 | No experience | 8116 | 
                                    
                                    32%
                                 | 
| 9 | Don't know | 735 | 
                                    
                                    2.9%
                                 | 
| 998 | Refused | 0 | 
                                    
                                    0%
                                 |