72% (1979)

67% (2003)

64% (1987)

64% (1978)

57% (1988)

65% (1990)

68% (2005)

59% (1995)

58% (1996)

60% (1996)

57% (1984)

56% (2018)

79% (1959)

74% (1961)

71% (2015)

56% (2011)

64% (1995)

64% (1993)

72% (2002)

73% (1971)