77% (1964)

60% (1973)

75% (1968)

80% (1960)

63% (1999)

67% (2004)

68% (1962)

80% (1992)

71% (1952)

71% (1999)

70% (2003)

49% (1979)

56% (1972)

54% (2010)

0% (1966)

68% (1955)

70% (1995)

80% (1953)

73% (1959)

48% (1972)