78% (1996)

70% (1986)

65% (1984)

70% (1986)

50% (1998)

90% (1990)

60% (1991)

80% (1997)

70% (1989)

0% (1986)

0% (1985)

64% (1990)

0% (1995)

0% (1994)

89% (1986)

70% (1987)

70% (1988)

70% (1987)

70% (1987)

0% (1991)