| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes, currently | 320 | 
                                    
                                    1.6%
                                 | 
| 2 | yes, in the past | 599 | 
                                    
                                    3%
                                 | 
| 3 | no | 19031 | 
                                    
                                    95.4%
                                 | 
| Sysmiss | 83 |