| Value | Category | Cases | |
|---|---|---|---|
| 44 | Vaccination given but no date recorded | 15 | 
                                
                                0.3%
                             | 
| 55 | invalid dates | 39 | 
                                
                                0.9%
                             | 
| 66 | Vaccination given but date not legible | 17 | 
                                
                                0.4%
                             | 
| 98 | 1 | 
                                
                                0%
                             | |
| 99 | Not Applicable | 4271 | 
                                
                                98.3%
                             | 
| Sysmiss | 1051 |