47% (1995)

70% (1994)

44% (1990)

67% (1991)

50% (1994)

46% (1989)

53% (1995)

57% (1993)

52% (1994)

50% (1991)

38% (1994)

53% (1996)

56% (1996)

67% (1997)

38% (1992)

65% (1996)

66% (1993)

62% (1989)

30% (1991)

50% (1994)