1968

1982

1985

1989

1990

1993

1999

1999

1999

2001

2007

2011

2011

2011

2012

Not much has changed since 1968.
Contact Ruby Cramer at ruby.cramer@buzzfeed.com.
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Andrew Kaczynski is a political reporter for BuzzFeed News and is based in New York.
Contact Andrew Kaczynski at andrew.kaczynski@buzzfeed.com.