63% (1990)

60% (1988)

60% (1984)

52% (1985)

50% (1993)

70% (1997)

50% (2002)

40% (1990)

71% (2002)

60% (1979)

52% (1988)

67% (2002)

0% (1979)

70% (1987)

80% (1987)

0% (1980)

59% (1999)

0% (2002)

70% (1981)

60% (1976)