50% (1975)

40% (1972)

50% (1962)

60% (1989)

50% (1964)

30% (1968)

0% (1980)

0% (1979)

72% (1978)

56% (1983)

0% (1963)

0% (1977)

50% (1989)

35% (1990)

35% (1982)

50% (1983)

30% (1983)

0% (1998)

40% (1984)

50% (1956)