68% (2010)

67% (2018)

69% (2016)

65% (2014)

47% (1996)

67% (2017)

74% (2014)

66% (1956)

58% (2009)

70% (2010)

53% (2005)

66% (2003)

52% (2006)

71% (2004)

62% (1960)

76% (1970)

60% (2018)

72% (2014)

75% (1963)

64% (2015)