| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 2 | 
                                    
                                    0%
                                 | 
| 0 | Never | 9474 | 
                                    
                                    37.3%
                                 | 
| 1 | Once or twice | 2969 | 
                                    
                                    11.7%
                                 | 
| 2 | A few times | 2369 | 
                                    
                                    9.3%
                                 | 
| 3 | Often | 2410 | 
                                    
                                    9.5%
                                 | 
| 7 | No experience | 7913 | 
                                    
                                    31.2%
                                 | 
| 9 | Don't know | 260 | 
                                    
                                    1%
                                 | 
| 998 | Refused | 0 | 
                                    
                                    0%
                                 |