51% (2018)

63% (2016)

57% (2016)

65% (2016)

43% (2015)

53% (2016)

55% (2013)

56% (2013)

56% (2011)

62% (2009)

60% (2010)

64% (1995)

63% (1999)

72% (1966)

56% (2007)

68% (1988)

50% (2010)

70% (1963)

74% (1953)

65% (1997)