42% (1978)

63% (2012)

58% (2010)

55% (1986)

58% (2009)

56% (2011)

64% (2014)

60% (2017)

57% (2013)

62% (2011)

65% (1965)

59% (2017)

59% (2023)

68% (1972)

52% (2015)

55% (2011)

63% (2019)

58% (2015)

51% (1999)

61% (1981)