43% (2007)

51% (2001)

38% (2004)

46% (2003)

38% (2002)

51% (2004)

45% (2003)

53% (2004)

32% (1998)

52% (2001)

40% (2002)

45% (2003)

31% (2006)

37% (2004)

20% (2001)

46% (2009)

60% (2003)

40% (2005)

27% (2000)

70% (1997)