| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 4 | 
                                    
                                    0%
                                 | 
| 0 | Never | 7975 | 
                                    
                                    31.4%
                                 | 
| 1 | Once or twice | 2914 | 
                                    
                                    11.5%
                                 | 
| 2 | A few times | 3207 | 
                                    
                                    12.6%
                                 | 
| 3 | Often | 2372 | 
                                    
                                    9.3%
                                 | 
| 7 | No experience | 8116 | 
                                    
                                    32%
                                 | 
| 9 | Don't know | 809 | 
                                    
                                    3.2%
                                 | 
| 998 | Refused | 0 | 
                                    
                                    0%
                                 |