77% (2008)

70% (2010)

71% (2005)

79% (2003)

61% (2011)

60% (2012)

82% (2010)

71% (2010)

67% (2013)

63% (2014)

68% (2012)

71% (2018)

80% (2013)

65% (2003)

0% (1999)

74% (1988)

69% (2006)

71% (2015)

70% (2005)

77% (2008)