76% (2018)

55% (2015)

62% (2004)

76% (2017)

65% (2005)

70% (2010)

59% (2018)

61% (2010)

64% (2006)

53% (2017)

63% (2011)

69% (2014)

71% (2001)

64% (2016)

48% (1997)

59% (2013)

69% (2016)

49% (2017)

63% (2017)

65% (2017)