Region
Afghanistan
2
Alaska
3
Arizona
3
Austin
2
California
2
California, Southern
1
Canada
3
Charlotte Region
1
Chesapeake Bay (Md. and Va.)
1
Chesapeake Bay Region (Md. and Va.)
1
Chesapeake Bay Watershed
1
Colombia
1
Colorado
4
Dallas
2
Delaware
2
Europe
1
European Union countries
3
Florida
1
Gulf Coast (U.S.)
1
Gulf States
7
Indiana
2
Korea (South)
1
Long Island
1
Los Angeles
1
Louisiana
2
Mexican-American Border Region
7
Michigan
1
Middle West
1
Montana
1
Nebraska
1
New Jersey
1
New Orleans
2
New York (State)
1
New York Metropolitan Area
1
North Carolina
1
Northern boundary of the United States
6
Panama
1
Peru
1
Puerto Rico
2
Russia (Federation)
1
Texas
4
United States
316
Utah
1
Washington (D.C.)
3
Washington (State)
1
Washington Region
3
West (U.S.)
2
Wisconsin
1