72% (1958)

76% (1973)

57% (1990)

65% (1989)

77% (1948)

61% (1970)

64% (1980)

70% (1946)

47% (1960)

61% (1993)

54% (1973)

74% (1970)

55% (1972)

64% (1978)

69% (1954)

60% (1950)

85% (1977)

69% (1957)

77% (1970)

42% (1979)