| Value | Category | Cases | |
|---|---|---|---|
| 44 | Vaccination given but no date recorded | 13 | 
                                
                                0.3%
                             | 
| 55 | invalid dates | 44 | 
                                
                                1%
                             | 
| 66 | Vaccination given but date not legible | 7 | 
                                
                                0.2%
                             | 
| 99 | Not Applicable | 4279 | 
                                
                                98.5%
                             | 
| Sysmiss | 1051 |