Obviously China, Russia, UK, USA etc are not significant enough to be part of this survey and make it to the top 10. I agree bharati.
They are all part of the survey, try again.
The Ipsos 'Index of Ignorance' table
Ranking Country
1 Mexico Least accurate
2 India
3 Brazil
4 Peru
5 New Zealand
6 Colombia
7 Belgium
8 South Africa
9 Argentina
10 Italy
11 Russia
12 Chile
13 Great Britain
14 Israel
15 Australia
16 Japan
17 Canada
18 Germany
19 Netherlands
20 Spain
21 Norway
22 France
23 Sweden
24 United States
25 China
26 Poland
27 Ireland
28 South Korea Most accurate
Ipsos MORI | Poll | Perils of Perception 2015