地區
United States
94
Canada
38
Developing countries
18
China
16
États-Unis
16
Australia
15
Europe
15
India
13
Africa
12
Eastern Europe
12
Europe, Eastern
12
Great Britain
12
Pakistan
11
Brazil
10
Chile
10
Latin America
10
Norway
10
Poland
10
Colombia
9
Colorado
9
Ireland
9
New Zealand
9
Spain
9
Finland
8
Italy
8
Middle East
8
Netherlands
8
Russia (Federation)
8
Germany
7
Indonesia
7
Japan
7
New York (State)
7
Philippines
7
Southern States
7
Taiwan
7
Arizona
6
Austria
6
Belgium
6
Denmark
6
East Asia
6
Kentucky
6
Malaysia
6
Mexico
6
Nigeria
6
North Carolina
6
OECD countries
6
Portugal
6
Romania
6
Singapore
6
Slovakia
6
更多 ...