58% (1953)

60% (2011)

45% (1951)

76% (1974)

75% (1981)

75% (1988)

60% (1957)

73% (1998)

62% (1987)

62% (2014)

47% (1996)

76% (2009)

65% (1996)

83% (1993)

74% (2015)

66% (1999)

50% (1959)

69% (1986)

60% (2003)

66% (2004)