77% (1964)

74% (1968)

80% (1960)

73% (1952)

55% (1973)

80% (1992)

70% (1995)

71% (1999)

73% (1959)

40% (1973)

48% (1972)

67% (2004)

0% (1968)

63% (1999)

80% (2000)

70% (2003)

56% (1972)

49% (1979)

68% (1975)

80% (1953)