48% (2001)

46% (2003)

44% (2003)

35% (2004)

44% (2007)

15% (2001)

51% (2004)

38% (2002)

32% (2006)

46% (2009)

31% (1998)

49% (2004)

42% (2002)

29% (1998)

49% (2001)

43% (2003)

35% (2004)

60% (2003)

27% (2000)

70% (1997)