| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 9 | 
                                    
                                    0%
                                 | 
| 0 | Never | 20581 | 
                                    
                                    84.5%
                                 | 
| 1 | Only once | 1325 | 
                                    
                                    5.4%
                                 | 
| 2 | A few times | 1556 | 
                                    
                                    6.4%
                                 | 
| 3 | Often | 780 | 
                                    
                                    3.2%
                                 | 
| 9 | Don't know | 98 | 
                                    
                                    0.4%
                                 | 
| 998 | Refused | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 1048 |