59% (1995)

74% (1992)

56% (1993)

43% (1993)

45% (1997)

56% (1994)

49% (2000)

46% (1997)

62% (1995)

53% (1993)

48% (1996)

56% (1996)

57% (1995)

64% (1997)

52% (1999)

50% (1998)

53% (1992)

53% (1991)

49% (1995)

48% (1997)