69% (1994)

50% (1991)

59% (1988)

60% (1989)

60% (1990)

65% (1989)

68% (1994)

68% (1991)

61% (1989)

0% (1993)

0% (1994)

0% (1991)

57% (1988)

64% (1998)

62% (1989)

80% (1994)

42% (1990)

40% (1987)

65% (1993)

50% (1993)