Historical HAI results:
April 2002
Year	Number of counties	# of birds	# of sera	# + EEE	# + SLE	#+WN
1988	6	95	136	0	1	0
1989	5	0	217	1	0	0
1990	7	216	270	1	0	0
1991	12	385	720	1	2	0
1992	9	445	1019	2	0	0
1993	7	391	829	1	1	0
1994	12	650	1187	1	0	0
1995	10	452	679	1	0	0
1996	17	825	1345	3	2	0
1997	9	436	789	0	0	0
1998	14	668	1577	5	2	0
1999	9	481	830	3	0	0
2000	7	406	770	0	0	0
2001	8	475	823	1	0	0
2002	17	869	2237	7	0	1
Average* (1988-2002)				1.8	0.5	0.5
Median* (1988-2002)				1.0	0.0	0.5

* EEE & SLE average/median: 1988-2002

* WNV average/median: 2001-2002

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