| Value | Category | Cases | |
|---|---|---|---|
| 1 | YES, ENTIRE QUESTIONNAIRE | 13 | 
                                    
                                    0.3%
                                 | 
| 2 | YES, PART OF QUESTIONNAIRE | 9 | 
                                    
                                    0.2%
                                 | 
| 3 | NO, NOT USED | 4060 | 
                                    
                                    85%
                                 | 
| Sysmiss | 695 | 
                                    
                                    14.5%
                                 |