74% (1951)

50% (1955)

61% (1997)

79% (1950)

80% (1974)

69% (1983)

35% (1974)

72% (1965)

75% (1959)

68% (1950)

60% (1956)

65% (1958)

65% (1960)

70% (1957)

62% (1960)

56% (1956)

62% (1958)

67% (2005)

50% (1962)

70% (1959)