Region
United States
2,058
États-Unis
398
Pennsylvania
247
Canada
244
Peru
202
Bolivia
198
Mexico
171
Australia
150
Latin America
144
Germany
124
Developing countries
116
Africa
104
Great Britain
98
India
95
Brazil
89
South Africa
88
Colorado
82
Montana
77
West (U.S.)
77
Alaska
72
California
70
Colombia
66
Nevada
66
Asia
64
Chile
63
China
59
Japan
59
Arizona
57
Idaho
57
Argentina
51
Soviet Union
49
Spain
49
England
46
Pennsylvanie
45
Sweden
43
Congo (Democratic Republic)
42
West Virginia
41
Europe
39
Pacific Area
39
Ecuador
37
Illinois
37
Maryland
37
Virginia
35
Ohio
33
Russia (Federation)
33
New Mexico
32
Oklahoma
32
British Columbia
31
South America
31
Minnesota
29
more ...