57% (1995)

52% (1993)

50% (1998)

67% (1997)

50% (1991)

74% (1992)

56% (1993)

66% (1997)

38% (1997)

59% (1995)

33% (1998)

50% (1995)

40% (1994)

49% (1993)

56% (1996)

54% (1997)

44% (1993)

59% (1992)

49% (2000)

37% (1994)