63% (1990)

50% (2002)

50% (1993)

70% (1997)

52% (1985)

52% (1988)

54% (1999)

40% (1990)

65% (2006)

70% (1987)

0% (1980)

0% (1981)

0% (1969)

70% (1999)

71% (2002)

0% (2006)

73% (2003)

0% (1987)

60% (1988)

0% (1979)