地区
United States
88
Canada
25
China
16
Developing countries
16
États-Unis
15
Europe
14
Australia
12
India
12
Great Britain
11
Eastern Europe
10
Europe, Eastern
10
Norway
10
Pakistan
10
Africa
9
Brazil
9
Chile
9
Colorado
9
Ireland
9
Italy
9
Poland
9
Spain
9
Finland
8
Germany
8
Netherlands
8
New Zealand
8
Asia
7
Indonesia
7
Japan
7
Latin America
7
Middle East
7
Philippines
7
Taiwan
7
Arizona
6
Austria
6
Belgium
6
Colombia
6
Denmark
6
Malaysia
6
New York (State)
6
Nigeria
6
OECD countries
6
Romania
6
Russia (Federation)
6
Singapore
6
Slovakia
6
Slovenia
6
Sweden
6
Switzerland
6
Texas
6
Turkey
6
更多 ...