I agree with you, BUT I really do not see how gender enters into it, not even to assess who fared the best in their respective gender groups. Example: I really don't think it matters that there are more females composing now than ever, as in my judgement there are no modern composers, male or female, in either gender, that meet the highest aesthetic and cognitive standards that music can exemplify - i.e. MOZART. Personally I do not think there has been any good music since Shostakovich and Stravinsky. But back to my point, music should NEVER be taught or studied on the basis of gender - i.e. a course called "female composers through-out the centuries". Using gender IN ANY WAY to evaluate the artistic merit of validity of a work is to say the least, a horrible absurdity and a debasement of the arts. HENCE, while I do concur with your statement, I will go one further and say that it is not even a matter of determining the proportion of "memorable"* composers in each gender group, but rather determining the proportion of good composers - composers who wrote music of the highest cognitive and aesthetic standards regardless of gender - to mediocre composers. To do as you propose, would be an exercise in futility as one will inevitably be able to assess "who fared the best."