71% (1973)

70% (1979)

63% (2006)

57% (2012)

61% (2020)

57% (2016)

64% (2021)

67% (1994)

67% (1988)

67% (1969)

65% (1971)

78% (1980)

80% (1991)

54% (2013)

55% (2014)

63% (1996)

58% (2016)

61% (1986)

66% (2004)

51% (2011)