70% (1972)

55% (1962)

50% (1968)

60% (1957)

0% (1973)

52% (1969)

57% (1962)

58% (1971)

54% (1971)

60% (1958)

50% (1969)

70% (1956)

57% (1972)

56% (1971)

57% (1971)

60% (1969)

50% (1990)

58% (1964)

57% (1966)

72% (1997)