73% (1973)

62% (1994)

68% (1963)

70% (1986)

72% (1982)

70% (1981)

61% (1973)

61% (1966)

70% (1962)

63% (1977)

67% (1964)

68% (1964)

67% (1965)

50% (1967)

63% (1975)

67% (1972)

63% (1964)

69% (1965)

53% (2000)

75% (2018)