NCTE gives a summary of largest survey of trans-identified individuals to date.
Sandy E. James, Jody L. Herman Susan Rankin Mara Keisling Lisa Mottet, and Ma’ayan Anaf, "The Report of the 2015 U.S. Transgender Survey," Washington, DC: National Center for Transgender Equality, December 2016, accessed August 31, 2021
A staggering 39% of respondents experienced serious psychological distress in the month prior to completing the survey, compared with only 5% of the U.S. population. Among the starkest findings is that 40% of respondents have attempted suicide in their lifetime—nearly nine times the attempted suicide rate in the U.S. population (4.6%).