Below the jump are the ASA sections ranked by the proportion of their members that are student members. I would have made it into a graph if I had sophomore-level Excel skills; as it is, you are lucky I managed to sort and round the numbers.
Is this a good measure of the areas of sociology we’d expect to get bigger or smaller in the years ahead? Main limitations I see to considering the numbers as a predictor of growth would be whatever extent the different areas have different probabilities of students transitioning to the professoriate and/or different probabilities of switching interest areas along the way. Plus areas may differ in the extent to which they recruit student members, especially those sections that tend to hover around the lines that determine how many sessions each section gets at the meetings.
Probably the biggest surprise for me on the high side is how student-dominated Race/Gender/Class still is (what happened to all the folks interested in this when I was a student?) and probably the biggest surprise on the low side is only 20% of Sociology of Population (do demography students mostly ignore ASA in favor of PAA?).