70% (2012)

52% (2013)

52% (2007)

74% (2004)

49% (1999)

60% (2005)

72% (2009)

56% (2007)

65% (2005)

55% (2007)

55% (2000)

66% (2010)

52% (2004)

46% (2002)

47% (1999)

54% (2007)

45% (2005)

54% (2002)

52% (2002)

60% (2007)