66% (1986)

60% (2013)

56% (1967)

58% (1989)

71% (1989)

59% (1996)

76% (1982)

61% (1983)

62% (1979)

59% (2018)

65% (1988)

68% (2002)

73% (1998)

56% (1962)

60% (2009)

60% (2014)

52% (1973)

71% (1979)

62% (2016)

62% (2009)