From: Twenty years of surveillance for Eastern equine encephalitis virus in mosquitoes in New York State from 1993 to 2012
Year
No. of participating counties
1993
9
1994
1995
1996
1997
1998
1999
2000
21
2001
43
2002
39
2003
29
2004
2005
27
2006
32
2007
26
2008
23
2009
15
2010
2011
14
2012
13