| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 10 | 
                                    
                                    0%
                                 | 
| 0 | Never | 14659 | 
                                    
                                    57.7%
                                 | 
| 1 | Once or twice | 1911 | 
                                    
                                    7.5%
                                 | 
| 2 | A few times | 1922 | 
                                    
                                    7.6%
                                 | 
| 3 | Often | 1785 | 
                                    
                                    7%
                                 | 
| 7 | No experience | 4347 | 
                                    
                                    17.1%
                                 | 
| 9 | Don't know | 763 | 
                                    
                                    3%
                                 | 
| 998 | Refused | 0 | 
                                    
                                    0%
                                 |