| Value | Category | Cases | |
|---|---|---|---|
| 2 | NO | 105 | 
                                    
                                    4.9%
                                 | 
| 2 | NO | 50 | 
                                    
                                    2.3%
                                 | 
| Sysmiss | 1998 | 
                                    
                                    92.8%
                                 |