42% (1982)

49% (1974)

54% (1985)

67% (1994)

58% (2010)

56% (1986)

67% (1972)

64% (2014)

66% (1994)

59% (1957)

65% (1965)

57% (2009)

55% (2007)

62% (2011)

56% (1972)

55% (2011)

36% (1969)

52% (1988)

65% (2006)

45% (1982)