54% (1960)

37% (1959)

76% (1997)

56% (1978)

82% (1989)

46% (1979)

54% (2007)

51% (2004)

61% (1955)

27% (2001)

60% (1987)

68% (1984)

64% (2009)

0% (1956)

60% (1962)

78% (1961)

70% (1987)

72% (1960)

46% (2004)

64% (1955)