Subject Region
United States
357
Developing countries
187
Latin America
141
China
135
Africa
82
Europe
81
India
80
Mexico
74
Asia
61
America Latina
59
Japan
45
Canada
42
East Asia
37
Foreign countries
37
European Union countries
35
Australia
24
Brazil
21
France
21
Islamic countries
21
Europe, Eastern
20
Great Britain
20
Pacific Area
20
Southeast Asia
20
Chile
18
Middle East
17
Philippines
17
North America
16
Arab countries
15
Germany
14
Spain
14
Caribbean Area
13
English-speaking countries
13
America
12
Korea (South)
12
South Asia
12
Southern States
12
Asia, Central
11
Ireland
11
Russia (Federation)
11
England
10
Singapore
10
Africa, Sub-Saharan
7
Developed countries
7
Europe, Central
7
Hong Kong
7
Indonesia
7
Shanghai
7
South Africa
7
Bolivia
6
Colombia
6
more ...