| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 801 | 
                                    
                                    23.2%
                                 | 
| 1 | yes | 2472 | 
                                    
                                    71.5%
                                 | 
| 2 | no vaccination in last 2 years | 74 | 
                                    
                                    2.1%
                                 | 
| 8 | don't know | 110 | 
                                    
                                    3.2%
                                 | 
| Sysmiss | 11489 |