68% (2017)

64% (1996)

65% (2015)

63% (2014)

68% (2012)

65% (2007)

70% (1975)

65% (1991)

64% (2013)

59% (1974)

66% (2019)

72% (2016)

70% (2020)

61% (1997)

68% (2019)

65% (2007)

56% (2013)

45% (1999)

71% (2002)

71% (1989)