| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2003 | 154 |
1.9%
|
| 2 | 2002 | 22 |
0.3%
|
| 3 | 2001 | 4 |
0%
|
| 4 | 2000 | 3 |
0%
|
| 5 | Before 2000 | 14 |
0.2%
|
| 6 | Not vaccinated | 8127 |
97.6%
|
| Sysmiss | 2032 |