77% (1964)

80% (1960)

74% (1968)

73% (1952)

67% (2004)

55% (1973)

40% (1973)

0% (1968)

70% (2003)

0% (1980)

54% (2010)

56% (1972)

70% (1995)

63% (1999)

68% (1975)

80% (1992)

60% (1969)

83% (1977)

48% (1972)

80% (2000)