56% (1993)

62% (1995)

53% (1992)

52% (1993)

43% (1996)

59% (1995)

74% (1992)

59% (1997)

56% (1994)

44% (1992)

49% (2000)

46% (1997)

50% (1998)

50% (2000)

46% (1997)

57% (1996)

64% (1997)

40% (1993)

53% (1991)

52% (1997)