45% (1971)

53% (1952)

68% (1954)

63% (1997)

48% (1971)

57% (1972)

62% (1976)

60% (1966)

65% (1969)

59% (1976)

63% (1979)

58% (1972)

63% (1969)

32% (1967)

74% (1951)

68% (1976)

67% (1964)

68% (1968)

32% (1968)

64% (1948)