You misinterpreted the NIH numbers. It isn’t 57% of 400 are untreated, but rather 57% of ~90 (NIH state 1 in 6/ 22.8% love with AMI). In any case though that ~90 figure relates to AMI which is a broad definition and includes very mild cases, whereas my numbers were related to SMI - which tends to be 5% (as supported by your NIH source). Having worked in the field, untreated schizophrenia is a lot more serious than untreated GAD or ADHD.
Edit: my gunshot source: https://www.pewresearch.org/short-reads/2023/04/26/what-the-data-says-about-gun-deaths-in-the-u-s/
Funnilly enough, if 2 people were shot a day in OP’s scenario, one of those would statistically be a suicide.
Wikipedia is only a source of concern if the primary sources it cites are unreliable, in the linked article they refer to ABS data which is the most accurate population data for that country. No LGBT question was asked in the more recent Australian census. The ~4% of population being homosexual was a talking point during our same sex marriage plebiscite, hence why I use it.
However, in recent US census data 3.3% of the population respond as being Lesbian or Gay, with 4.4% bisexual https://www.census.gov/library/stories/2021/11/census-bureau-survey-explores-sexual-orientation-and-gender-identity.html. It’d be interesting to see how that percentage progresses as majority of positive respondents were in younger generations, while I doubt any will go from identifying as gay to then straight, we may see a decline in those who identify as bisexual as they age…but who knows.
Regardless, returning to the OC, the figures for trans were all around the 0.6 mark in most sources I saw, so the 2/400 in the OC is accurate.