27% (2004)

69% (1998)

54% (1997)

47% (2007)

58% (2005)

62% (2001)

47% (2002)

60% (2000)

64% (2004)

19% (2007)

58% (2006)

74% (2004)

60% (2003)

73% (1993)

64% (2005)

58% (2003)

52% (2006)

69% (1992)

69% (1999)

32% (2006)