66% (2007)

67% (2002)

68% (2007)

56% (2010)

52% (2010)

58% (2004)

40% (2001)

54% (2000)

53% (2007)

57% (2006)

46% (2008)

74% (2009)

60% (2010)

65% (2002)

50% (2007)

70% (2009)