77% (1964)

80% (1960)

74% (1968)

80% (1992)

70% (2003)

71% (1952)

80% (2000)

56% (1972)

49% (1979)

50% (2010)

67% (2004)

67% (1970)

0% (1953)

70% (1995)

71% (1999)

68% (1962)

50% (1999)

60% (1973)

83% (1977)

0% (1956)