61% (2009)

67% (2013)

55% (2005)

62% (1985)

69% (2015)

66% (1976)

72% (1972)

52% (1985)

40% (2002)

59% (1923)

66% (2018)

57% (1997)

59% (2009)

63% (2016)

61% (2005)

57% (2011)

73% (2008)

65% (2012)

62% (2005)

61% (2011)