77% (1964)

74% (1968)

80% (1960)

55% (1973)

70% (2003)

80% (1992)

73% (1952)

63% (1999)

71% (1999)

60% (2008)

69% (1970)

80% (1953)

49% (1972)

56% (1972)

0% (1966)

70% (1954)

70% (1995)

80% (2000)

0% (1980)

40% (1973)