77% (1964)

74% (1968)

80% (1960)

80% (1992)

55% (1973)

73% (1952)

67% (2004)

40% (1973)

70% (2003)

63% (1999)

70% (1995)

0% (1980)

60% (1969)

56% (1972)

0% (1968)

68% (1975)

48% (1972)

54% (2010)

69% (1970)

80% (2000)