69% (1975)

81% (1993)

55% (1992)

72% (1993)

81% (1971)

75% (1959)

73% (1982)

80% (1974)

73% (1995)

68% (1998)

70% (2003)

78% (1972)

29% (2002)

78% (1989)

65% (1999)

70% (1976)

74% (1996)

74% (1995)

51% (2002)

70% (1996)