70% (1975)

65% (1980)

50% (1992)

64% (1966)

57% (1971)

51% (1973)

74% (1969)

80% (1963)

58% (1977)

31% (1988)

0% (1970)

40% (1975)

60% (1973)

40% (1987)

0% (1969)

0% (1979)

67% (1965)

0% (1964)

0% (1973)

51% (1970)