56% (1993)

74% (1992)

59% (1995)

53% (1993)

46% (1997)

49% (2000)

50% (1998)

56% (1994)

64% (1997)

62% (1995)

53% (1991)

43% (1993)

56% (1996)

66% (1994)

48% (1996)

63% (1997)

50% (1995)

45% (1997)

50% (1993)

43% (1996)