79% (1955)

72% (1975)

67% (1950)

81% (1972)

56% (1960)

27% (2007)

46% (2012)

75% (1978)

75% (1976)

61% (1965)

55% (1957)

57% (1973)

50% (1954)

50% (1949)

50% (1960)

60% (1958)

50% (1947)

52% (1968)

53% (1949)

55% (1960)