| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 81 | 
                                    
                                    6.6%
                                 | 
| 1 | Sometimes | 548 | 
                                    
                                    44.5%
                                 | 
| 2 | Often | 602 | 
                                    
                                    48.9%
                                 | 
| Sysmiss | DK | 0 | |
| Sysmiss | RF | 0 | |
| Sysmiss | 109 |