78% (1990)

70% (1986)

65% (1984)

50% (1991)

0% (1988)

80% (1985)

60% (1992)

40% (1987)

66% (1991)

63% (1986)

60% (1986)

65% (1986)

60% (1987)

64% (1985)

0% (1991)

0% (1989)

0% (1986)

0% (1987)

62% (1990)

0% (1986)