50% (2014)

68% (2009)

71% (2012)

62% (2004)

69% (1997)

69% (2003)

62% (2008)

72% (2015)

51% (2014)

60% (2008)

63% (2005)

72% (2007)

64% (2004)

0% (1970)

55% (2018)

63% (2016)

76% (2018)

61% (2012)

58% (2010)

67% (2010)