53% (1958)

50% (1947)

56% (1948)

60% (1953)

67% (1950)

52% (1953)

55% (1961)

55% (1960)

56% (1970)

50% (1960)

53% (1955)

50% (1961)

50% (1966)

60% (1958)

44% (1979)

55% (1957)