30% (1985)

50% (1979)

37% (1976)

30% (1998)

82% (1982)

65% (1973)

61% (2001)

62% (1994)

40% (2002)

32% (1983)

59% (1994)

30% (1998)

37% (1998)

65% (2001)

64% (2004)

0% (2002)

67% (1975)

66% (1990)

68% (1969)

80% (1999)