56% (2011)

67% (2006)

69% (1998)

80% (1973)

68% (1992)

69% (1993)

78% (1980)

67% (1996)

65% (2006)

59% (2009)

75% (1931)

58% (1992)

51% (2015)

69% (1996)

65% (1985)

66% (2007)

50% (2000)

60% (1995)

48% (2008)

67% (2000)