From Google's Ngram viewer, the percentage of books published in the US, by year, that contain the term "sexes" and that contain the term "genders". Both terms are plural to facilitate the making of an apples-to-apples comparison (the verb form of "sex" thus being excluded).
If sex/gender is more than just a social construction, perhaps it can still be reduced to little more than a surgical construction? Just don't look at brain scans, musculature, waist-to-hip ratio, height, vocal inflection...
Oh yeah, you're a woman trapped in a man's body, are you? Prove it!:
As the concerns of gays and especially lesbians get trounced by trannies, one wonders what even more marginal, less consequential group's hyperbolic concerns will displace those of the gender benders.