73% (2007)

80% (2009)

62% (1997)

67% (2010)

62% (2012)

75% (2014)

53% (2000)

73% (2001)

56% (2014)

56% (1996)

76% (2012)

53% (2012)

67% (2009)

64% (2012)

70% (2005)

66% (2014)

71% (2011)

67% (2015)

67% (2014)

73% (1995)