| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 3 | 
                                    
                                    0%
                                 | 
| 0 | Never | 7415 | 
                                    
                                    29.2%
                                 | 
| 1 | Once or twice | 2929 | 
                                    
                                    11.5%
                                 | 
| 2 | A few times | 3259 | 
                                    
                                    12.8%
                                 | 
| 3 | Often | 3176 | 
                                    
                                    12.5%
                                 | 
| 7 | No experience | 8117 | 
                                    
                                    32%
                                 | 
| 9 | Don't know | 498 | 
                                    
                                    2%
                                 | 
| 998 | Refused | 0 | 
                                    
                                    0%
                                 |