73% (2007)

80% (2009)

62% (2012)

67% (2010)

75% (2012)

78% (2004)

75% (2014)

71% (2011)

67% (2009)

64% (2012)

65% (1997)

73% (2001)

53% (2012)

60% (2008)

55% (2011)

64% (2008)

56% (2014)

66% (1997)

67% (2010)

67% (2015)