77% (1964)

80% (1960)

74% (1968)

55% (1973)

70% (1995)

80% (1992)

73% (1952)

70% (2003)

63% (1999)

67% (2004)

73% (1959)

0% (1980)

0% (1968)

68% (1975)

0% (1956)

80% (1953)

40% (1973)

49% (1979)

60% (1969)

69% (1970)