77% (1964)

74% (1968)

80% (1960)

55% (1973)

73% (1952)

70% (2003)

71% (1999)

80% (1992)

40% (1973)

73% (1959)

49% (1972)

0% (1978)

67% (2004)

56% (1972)

60% (2008)

54% (2010)

70% (1995)

63% (1999)

80% (2000)

69% (1970)