| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 | 
                                    
                                    0.6%
                                 | 
| -8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| -5 | Not applicable | 0 | 
                                    
                                    0%
                                 | 
| -3 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Every day | 5 | 
                                    
                                    2.8%
                                 | 
| 2 | Several times a week | 13 | 
                                    
                                    7.3%
                                 | 
| 3 | Several times a month | 67 | 
                                    
                                    37.4%
                                 | 
| 4 | Several times a year | 73 | 
                                    
                                    40.8%
                                 | 
| 5 | Never | 20 | 
                                    
                                    11.2%
                                 | 
| Sysmiss | 820 |