70% (1994)

81% (1992)

60% (1996)

63% (1992)

60% (1997)

65% (1992)

48% (1994)

66% (1997)

67% (1992)

69% (1996)

43% (1994)

48% (1995)

62% (1993)

62% (1993)

65% (1994)

42% (1993)

52% (1998)

64% (1997)

55% (1996)

62% (1996)