67% (2002)

68% (1997)

69% (2002)

62% (1996)

60% (2004)

72% (1998)

61% (1995)

67% (1999)

52% (2000)

62% (2002)

61% (1999)

64% (2001)

49% (2005)

66% (2006)

69% (1990)

50% (2000)

65% (1998)

64% (2002)

47% (2002)

54% (1996)