| Value | Category | Cases | |
|---|---|---|---|
| 1 | YES | 4575 | 
                                    
                                    22.8%
                                 | 
| 2 | NO | 15214 | 
                                    
                                    75.9%
                                 | 
| 9 | NO RESPONSE | 268 | 
                                    
                                    1.3%
                                 | 
| Sysmiss | 591 |