70% (1975)

64% (1966)

58% (1977)

65% (1980)

57% (1971)

80% (1963)

60% (1973)

40% (1987)

74% (1969)

51% (1973)

31% (1988)

0% (1970)

67% (1965)

40% (1975)

50% (1992)

0% (1964)

0% (1969)

0% (1979)

51% (1970)

0% (1973)