70% (1961)

60% (1974)

0% (1951)

60% (1961)

50% (1966)

80% (1970)

60% (1960)

50% (1977)

90% (1957)

50% (1984)

0% (1980)

60% (1959)

0% (1972)

0% (1987)

70% (1953)

65% (1978)

40% (1981)

60% (1977)

80% (1955)

70% (1974)