Region
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Saudi Arabia
13
Switzerland
13
Ukraine
13
Ethiopia
12
London (England)
12
OECD countries
12
Oklahoma
12
Sweden
12
Baltimore
11
Eurasia
11
Ghana
11
Iowa
11
Maine
11
Nebraska
11
Northwest, Pacific
11
Puerto Rico
11
Saskatchewan
11
Seattle
11
Bulgaria
10
Central America
10
Manitoba
10
Mississippi
10
New Orleans
10
Norway
10
Polar regions
10
Russia
10
San Jose
10
Slovakia
10
Alabama
9
Austin
9
Communist countries
9
Delaware
9
Hong Kong
9
Hong Kong (China)
9
Kansas
9
Montana
9
Rhode Island
9
Saint Louis
9
Utah
9
Africa, North
8
Antarctica
8
Arkansas
8
Bosnia and Herzegovina
8
Canada, Western
8
Commonwealth countries
8
Dallas
8
Estonia
8
Iraq
8
Ottawa
8
Santa Cruz
8
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