71% (1971)

65% (2005)

60% (2008)

62% (1991)

61% (1990)

73% (2008)

61% (1994)

60% (2008)

64% (2020)

56% (2012)

58% (2018)

60% (2007)

60% (1999)

73% (1947)

71% (1992)

66% (2014)

60% (1987)

55% (1996)

69% (1954)

66% (1966)