From 1921 women were awarded diplomas which "conferred the Title of the Degree of Bachelor of Arts". As they were not "admitted to the Degree of Bachelor of Arts" they were excluded from the governing of the university. Since students must belong to a college, and since established colleges remained closed to women, women found admissions restricted to colleges established only for women. Darwin College, the first wholly graduate college of the university, matriculated both men and women students from its inception in 1964 – and elected a mixed fellowship. Of the undergraduate colleges, starting with Churchill, Clare and King's Colleges, the former men's colleges began to admit women between 1972 and 1988. One of the female-only colleges, Girton, also began to admit male students from 1979, but the other female-only colleges did not do likewise. As a result of St Hilda's College, Oxford , ending its ban on male students in 2008, Cambridge is now the only remaining United Kingdom university with female-only colleges (Newnham, Murray Edwards and Lucy Cavendish).   In the academic year 2004–5, the university's student sex ratio, including post-graduates, was male 52%: female 48%.