72% (1984)

81% (1981)

73% (1993)

60% (2009)

60% (2021)

74% (1972)

71% (2005)

69% (1985)

71% (1982)

61% (2007)

63% (1997)

58% (2002)

64% (1989)

67% (2000)

77% (1991)

71% (2001)

62% (1984)

76% (1972)

70% (1988)

69% (1955)