| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes regularly | 3630 | 
                                    
                                    7.5%
                                 | 
| 2 | Yes sometimes | 12588 | 
                                    
                                    26.2%
                                 | 
| 3 | No, never | 31880 | 
                                    
                                    66.3%
                                 | 
| Sysmiss | 33680 |