81% (1971)

76% (1959)

79% (1974)

74% (1995)

70% (1975)

70% (1992)

70% (2003)

72% (2001)

73% (1982)

55% (1992)

72% (1993)

79% (1972)

79% (1989)

68% (1998)

81% (1993)

65% (1999)

70% (1976)

74% (1996)

71% (1996)

69% (1977)