78% (1979)

59% (2009)

66% (1981)

67% (2009)

72% (1980)

73% (1987)

81% (1998)

69% (1986)

63% (1989)

58% (1990)

74% (1982)

42% (1986)

64% (2003)

69% (1997)

62% (2021)

63% (1984)

58% (1987)

56% (1982)

56% (1988)

54% (2007)