82% (1992)

61% (1997)

70% (1994)

63% (1992)

60% (1996)

69% (1996)

67% (1992)

63% (1993)

48% (1994)

65% (1994)

62% (1993)

67% (1997)

65% (1992)

44% (1994)

64% (1997)

46% (1989)

61% (1996)

48% (1993)

49% (1995)

53% (1996)