56% (1978)

76% (1997)

54% (1960)

60% (1962)

54% (2007)

40% (1955)

64% (1955)

46% (2004)

61% (1955)

41% (1972)

68% (1998)

50% (1964)

0% (2004)

67% (1984)

32% (1999)

0% (1956)

51% (2004)

74% (1980)

77% (1961)

82% (1989)