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Map of All Studies in
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Map Legend

Region Name   Number of Studies
World   [map]   179458  
North America 89843  
United States 81512   [studies]
Alabama 6327   [studies]
Alaska 396   [studies]
Arizona 7141   [studies]
Arkansas 3365   [studies]
California 21836   [studies]
Colorado 7253   [studies]
Connecticut 5378   [studies]
Delaware 1383   [studies]
District of Columbia 3751   [studies]
Florida 14444   [studies]
Georgia 8794   [studies]
Hawaii 1398   [studies]
Idaho 1741   [studies]
Illinois 11644   [studies]
Indiana 6649   [studies]
Iowa 3393   [studies]
Kansas 4423   [studies]
Kentucky 4747   [studies]
Louisiana 4828   [studies]
Maine 1327   [studies]
Maryland 12705   [studies]
Massachusetts 12136   [studies]
Michigan 9084   [studies]
Minnesota 7653   [studies]
Mississippi 2114   [studies]
Missouri 8720   [studies]
Montana 1596   [studies]
Nebraska 3865   [studies]
Nevada 2936   [studies]
New Hampshire 1639   [studies]
New Jersey 7295   [studies]
New Mexico 2331   [studies]
New York 17854   [studies]
North Carolina 11913   [studies]
North Dakota 1507   [studies]
Ohio 12903   [studies]
Oklahoma 4277   [studies]
Oregon 5626   [studies]
Pennsylvania 13985   [studies]
Rhode Island 2651   [studies]
South Carolina 6021   [studies]
South Dakota 1321   [studies]
Tennessee 8522   [studies]
Texas 17865   [studies]
Utah 4548   [studies]
Vermont 1437   [studies]
Virginia 7072   [studies]
Washington 8121   [studies]
West Virginia 1398   [studies]
Wisconsin 5220   [studies]
Wyoming 318   [studies]

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Studies with no locations are not included in the counts or on the map.

Studies with multiple locations are included in each region containing locations.