64% (1968)

56% (1996)

61% (2020)

64% (1981)

64% (1991)

60% (2008)

67% (1971)

64% (1998)

65% (1993)

59% (1981)

64% (1979)

62% (2001)

74% (1955)

58% (1995)

71% (2007)

60% (1999)

71% (2014)

59% (2007)

65% (2005)

71% (1925)