1.6% of US adults are trans or non-binary https://www.pewresearch.org/short-reads/2022/06/07/about-5-o...

1.6 million in the US https://williamsinstitute.law.ucla.edu/wp-content/uploads/Tr...

3% worldwide https://www.statista.com/statistics/1269778/gender-identity-...

And considering the current climate, I can imagine these numbers are under reported.