| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | No | 580 | 
                                    
                                    48.3%
                                 | 
| 1 | Yes, once or twice | 145 | 
                                    
                                    12.1%
                                 | 
| 2 | Yes, several times | 331 | 
                                    
                                    27.6%
                                 | 
| 3 | Yes, often | 142 | 
                                    
                                    11.8%
                                 | 
| 8 | Refused to answer | 1 | 
                                    
                                    0.1%
                                 | 
| 9 | Don't know | 1 | 
                                    
                                    0.1%
                                 |