70% (1992)

75% (1992)

60% (1971)

80% (1969)

67% (1999)

60% (1987)

56% (1982)

45% (1969)

50% (1969)

67% (1979)

60% (1974)

63% (1996)

40% (1978)

60% (2002)

55% (1984)

72% (1979)

76% (2003)

77% (1985)

60% (1979)

60% (1987)