69% (1994)

63% (1993)

63% (1994)

55% (1993)

61% (1988)

63% (1986)

63% (1986)

55% (1987)

68% (1988)

53% (1987)

58% (1989)

59% (1989)

50% (1989)

60% (1987)

69% (1990)

55% (1988)

66% (1987)

42% (1987)

58% (1996)

58% (1989)