48% (1987)

62% (1988)

0% (1988)

69% (1990)

42% (1987)

40% (1987)

62% (1990)

48% (1989)

48% (1988)

59% (1989)

59% (1988)

10% (1990)

41% (1994)

56% (1988)

60% (1989)

45% (1989)

58% (1993)

61% (1987)

58% (1990)

70% (1994)