64% (1971)

18% (1972)

10% (1965)

0% (1960)

0% (1971)

0% (1985)

0% (1978)

0% (1959)

0% (1983)

0% (1958)

70% (1976)

82% (1982)

77% (1979)

90% (1985)

85% (1980)

50% (1986)

0% (1969)

10% (1990)

0% (1973)

0% (1989)