71% (1971)

70% (1979)

67% (1966)

62% (1968)

58% (1989)

30% (1960)

67% (1973)

62% (1969)

51% (1969)

63% (1968)

52% (1970)

51% (1971)

51% (1972)

54% (1964)

0% (1957)

100% (1970)

68% (1967)

70% (1966)

61% (1982)

50% (1966)