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BIR10and the length of tick bite reporting period for groups of AO districts
| BIR10 | Length of tick-bite reporting period, month | |||||
|---|---|---|---|---|---|---|
| Northern | Central | Southern | Northern | Central | Southern | |
| 1980–1989 | 0.1 | 36.2 | 44.8 | 0.1 | 1.9 | 3.2 |
| 1990–1999 | 2.3 | 115.1 | 292.3 | 0.7 | 2.5 | 3.3 |
| 2000–2009 | 28.1 | 557.0 | 732.9 | 2.0 | 3.8 | 4.8 |
