56% (1993)

59% (1995)

56% (1994)

48% (2000)

74% (1992)

54% (1992)

47% (1997)

52% (1993)

52% (1999)

53% (1991)

56% (1996)

50% (1998)

43% (1993)

43% (1996)

40% (1993)

45% (1997)

62% (1995)

63% (1997)

50% (2000)

49% (1995)