63% (1960)

65% (1950)

61% (1955)

53% (1986)

59% (1958)

64% (1949)

42% (1964)

57% (1991)

65% (2010)

56% (1962)

54% (1991)

67% (1958)

80% (1961)

93% (1997)

49% (1954)

68% (1959)

66% (1959)

70% (1960)

60% (1953)

72% (1961)