59% (2009)

66% (2010)

54% (1990)

65% (2014)

66% (1999)

71% (1993)

73% (1977)

62% (2014)

70% (1955)

75% (1968)

63% (1995)

58% (2008)

67% (1978)

64% (1999)

63% (1974)

66% (1963)

68% (1973)

57% (1992)

76% (1976)

67% (1970)