64% (1965)

60% (1987)

61% (1988)

63% (1974)

55% (1991)

71% (1972)

62% (1965)

49% (1991)

72% (1971)

74% (1961)

10% (1966)

71% (1982)

56% (1981)

64% (1976)

66% (1970)

48% (1980)

63% (1957)

70% (1963)

60% (1972)

72% (1981)