68% (2001)

64% (1965)

59% (1988)

66% (1964)

72% (2009)

72% (1955)

75% (1967)

63% (1994)

57% (1974)

73% (2007)

53% (1985)

66% (1958)

66% (1977)

66% (1991)

66% (1970)

61% (1977)

62% (1978)

59% (2006)

65% (2015)

66% (1999)