| Value | Category | Cases | |
|---|---|---|---|
| 1 | YES, ENTIRE QUESTIONNAIRE | 2270 | 
                                    
                                    11.2%
                                 | 
| 2 | YES, PART OF QUESTIONNAIRE | 177 | 
                                    
                                    0.9%
                                 | 
| 3 | NO, NOT USED | 17767 | 
                                    
                                    87.9%
                                 | 
| Sysmiss | 307 |