https://www.brown.edu/campus-life/health/services/promotion/sexual-assault-dating-violence/myths-about-sexual-assault-reports

https://www.nsvrc.org/publications/articles/false-reports-moving-beyond-issue-successfully-investigate-and-prosecute-non-s

https://amp.cnn.com/cnn/2018/10/03/health/sexual-assault-false-reports/index.html

https://evawintl.org/best_practice_faqs/false-reports-percentage/

I mean it’s between 2-8% according to most studies, and the highest I think I saw in those listed above was 10%. I would personally still find that to be uncommon.