| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 1979 | 
                                    
                                    96.8%
                                 | 
| 2 | No | 66 | 
                                    
                                    3.2%
                                 | 
| 11 | .Z | 1 | |
| Sysmiss | 463314 |