Statistics for 1960s, 70s, or 80s?

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Question	Answer	% Correct
The Beatles played on the Ed Sullivan Show.	1960s	98%
JFK was assasinated.	1960s	98%
The first Apollo moon landing occurred.	1960s	90%
The Berlin Wall is built.	1960s	83%
Space Shuttle Challenger disaster.	1980s	83%
Star War "A New Hope" premiered in movie theaters.	1970s	80%
Chernobyl nuclear meltdown occurs.	1980s	80%
Khmer Rouge took control of Cambodia.	1970s	69%
Mikhail Gorbachev becomes General Secretary of the Soviet Union.	1980s	65%
The Iranian Revolution toppled the Shah and put in a theocratic Islamist government.	1970s	64%
Start of Richard Nixon's Presidency.	1960s	57%
Pac Man video game first released.	1980s	51%
The Cultural Revolution in China ended.	1970s	49%
Last time the Yankees baseball team won the world series before the 90s.	1970s	47%
The Rubik's Cube is invented.	1970s	40%
Alfred Hitchcock passes away.	1980s	40%