61% (1974)

74% (2002)

70% (1992)

61% (1999)

77% (1999)

71% (1988)

60% (1972)

72% (1994)

72% (2004)

70% (2002)

67% (1989)

68% (1974)

71% (1979)

61% (1975)

32% (1999)

61% (1982)

78% (1969)

76% (1986)

61% (1995)

63% (1983)