56% (1993)

74% (1992)

45% (1997)

59% (1995)

55% (1994)

47% (1997)

44% (1993)

50% (1995)

64% (1997)

49% (2000)

53% (1991)

45% (1997)

50% (1998)

40% (1993)

53% (1999)

54% (1998)

57% (1995)

53% (1993)

50% (2000)

59% (1997)