Year | # of Countries | % Correct |
---|---|---|
2015 | 196 | 100%
|
2005 | 192 | 86%
|
1995 | 191 | 84%
|
1985 | 164 | 79%
|
1965 | 147 | 78%
|
1975 | 157 | 78%
|
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