77% (1970)

74% (1979)

51% (1965)

78% (1961)

68% (1988)

67% (1964)

46% (1935)

73% (1964)

77% (1971)

10% (1982)

58% (1989)

51% (1982)

71% (1987)

72% (1979)

53% (1955)

70% (1988)

68% (1976)

59% (1986)

55% (1972)

81% (1968)