46% (2008)

44% (2008)

41% (2007)

64% (2008)

67% (2009)

35% (2005)

35% (2004)

56% (2006)

57% (2010)

30% (2006)

41% (2008)

51% (2004)

40% (2002)

51% (2006)

54% (2008)

45% (2005)

52% (2008)

56% (2004)

58% (2005)

39% (2008)