79% (1973)

71% (1968)

72% (1966)

70% (1965)

72% (1972)

68% (1971)

62% (1965)

68% (1966)

63% (1980)

64% (1969)

65% (1978)

61% (1972)

53% (2019)

63% (1963)

47% (1970)

70% (2007)

41% (2015)

0% (1970)