70% (1975)

30% (2002)

74% (1995)

68% (1998)

75% (1959)

60% (2004)

81% (1971)

73% (1982)

80% (1993)

79% (1989)

80% (1974)

40% (1999)

70% (1996)

78% (1972)

71% (1993)

74% (1996)

54% (1992)

70% (1976)

66% (1999)

70% (2003)