| Value | Category | Cases | |
|---|---|---|---|
| 44 | Vaccination given but no date recorded | 68 | 
                                
                                1.6%
                             | 
| 55 | invalid dates | 44 | 
                                
                                1%
                             | 
| 66 | Vaccination given but date not legible | 6 | 
                                
                                0.1%
                             | 
| 99 | Not Applicable | 4244 | 
                                
                                97.3%
                             | 
| Sysmiss | 1032 |