71% (1975)

58% (1977)

64% (1966)

55% (1971)

67% (1965)

80% (1963)

34% (1987)

29% (1988)

50% (1992)

60% (1973)

77% (1980)

0% (1969)

40% (1972)

52% (1973)

0% (1979)

40% (1975)

32% (1972)

0% (1964)

51% (1970)

0% (1962)