47% (1995)

58% (1993)

50% (1995)

52% (1994)

72% (1994)

65% (1996)

39% (1994)

56% (1996)

50% (1991)

53% (1995)

50% (1994)

39% (1994)

50% (1994)

67% (1997)

44% (1990)

67% (1991)

37% (1991)

49% (1994)

53% (1991)

38% (1992)