58% (1979)

55% (1991)

68% (1969)

67% (1985)

73% (2008)

71% (1925)

60% (1999)

61% (1989)

64% (1990)

57% (1980)

61% (1993)

61% (2005)

72% (1981)

60% (1994)

56% (2001)

60% (1989)

56% (1992)

73% (1973)

69% (1954)

71% (2020)