69% (1994)

59% (1988)

68% (1994)

50% (1991)

58% (1992)

60% (1990)

65% (1989)

80% (1994)

60% (1989)

68% (1991)

42% (1990)

0% (1988)

50% (1993)

40% (1987)

65% (1993)

0% (1992)

10% (1993)

62% (1989)

0% (1990)

57% (1988)