In 1970, women accounted for about what proportion of new doctorates in psychology?

The answer is one-fifth

Since the 1970s, the number of women who have enrolled in new doctorates in psychology has kept on increasing. 

This was the post-war world in which a  growing number of women were studying for higher education and making a name for themselves.

Since then, some of the most well-known and prominent psychologists in the world have been women.