Region
United States
1,695
Nebraska
531
West (U.S.)
250
Mexico
114
Great Plains
104
California
100
France
97
North America
96
Middle West
73
Kansas
65
Great Britain
63
Germany
56
Montana
51
Canada
50
South Dakota
42
Wyoming
42
Southern States
41
Oklahoma
40
America
36
Missouri River Watershed
36
Colorado
35
England
34
New York (State)
32
Europe
31
Illinois
29
Confederate States of America
28
Latin America
26
Omaha
26
Spain
26
Northwest, Pacific
25
Soviet Union
25
Alaska
22
New Mexico
22
Argentina
20
Brazil
20
China
20
Iowa
20
Israel
20
Missouri
20
Southwest, New
20
High Plains (U.S.)
19
Japan
19
Texas
19
Washington (State)
19
Russia (Federation)
18
Africa
17
Algeria
17
Oregon
17
Indian Territory
16
Pennsylvania
15
more ...