| Year | Country | % Correct |
|---|---|---|
| 1979 | United Kingdom | 91%
|
| 1966 | India | 83%
|
| 1981 | Norway | 70%
|
| 1980 | Iceland | 61%
|
| 1974 | Argentina | 59%
|
| 1969 | Israel | 59%
|
| 1990 | Ireland | 50%
|
| 1960 | Sri Lanka | 50%
|
| 1988 | Pakistan | 46%
|
| 1979 | Portugal | 39%
|
| 1991 | Bangladesh | 35%
|
| 1986 | Philippines | 33%
|
| 1981 | China | 30%
|
| 1979 | Bolivia | 26%
|
| 1990 | Nicaragua | 17%
|
| 1990 | Haiti | 15%
|
| 1990 | Lithuania | 15%
|
| 1982 | Malta | 15%
|
| 1980 | Dominica | 11%
|
| 1975 | Central African Republic | 9%
|