60% (1975)

39% (2009)

45% (1958)

59% (2015)

65% (1988)

70% (1988)

60% (2010)

62% (1968)

68% (2000)

57% (1937)

40% (1995)

54% (1998)

54% (1953)

56% (2016)

61% (1975)

45% (2008)

57% (2017)

78% (2010)

56% (2011)

54% (2009)