63% (1990)

58% (1984)

52% (1988)

50% (2002)

70% (1997)

60% (1988)

52% (1985)

71% (2002)

50% (1993)

65% (2006)

70% (1987)

65% (1986)

72% (1999)

40% (1990)

70% (1999)

73% (2003)

85% (1974)

68% (1993)

0% (1982)

40% (1998)