69% (1998)

60% (2003)

19% (2007)

47% (2007)

58% (2003)

74% (2004)

52% (2006)

54% (1997)

65% (2004)

32% (2006)

47% (2002)

73% (1992)

69% (2002)

69% (1999)

64% (2005)

62% (2001)

58% (2006)

60% (2000)

48% (1999)

52% (2004)