81% (1971)

69% (1975)

75% (1959)

29% (2002)

73% (1995)

79% (1974)

80% (1993)

69% (1998)

71% (1993)

78% (1972)

70% (2003)

78% (1989)

73% (1982)

54% (1992)

77% (2001)

74% (1996)

60% (2001)

65% (1999)

70% (1976)

68% (1977)