71% (2013)

58% (2007)

53% (2010)

71% (2008)

50% (2012)

78% (2008)

56% (1980)

76% (2008)

57% (2008)

54% (2014)

47% (2012)

55% (1997)

55% (2011)

43% (2003)

89% (1995)

50% (1926)

59% (1940)

53% (2004)

33% (2010)

71% (2013)