69% (1998)

68% (2002)

63% (2004)

73% (2004)

62% (2005)

59% (2003)

50% (2006)

19% (2007)

59% (2003)

52% (1997)

66% (1999)

48% (1999)

60% (2000)

47% (2002)

47% (2007)

32% (2006)

52% (2004)

58% (2005)

70% (1992)

72% (1997)