56% (1996)

68% (1992)

49% (1994)

73% (1994)

67% (1999)

40% (1994)

34% (1995)

45% (1995)

59% (1996)

46% (1996)

50% (1995)

52% (1992)

50% (1994)

72% (1996)

53% (1999)

40% (1993)

30% (1999)

56% (1999)

53% (1998)

50% (2001)