64% (1990)

78% (1996)

50% (1998)

60% (1984)

0% (1994)

70% (1989)

89% (1986)

70% (1986)

70% (1987)

0% (1985)

70% (1987)

70% (1987)

90% (1990)

70% (1988)

80% (1997)

70% (1986)

0% (1986)

0% (1970)