Not to detract from the overall message, buuuut....
48,313 gun deaths in US in 2021.
333,000,000 people in US
On those rates 0.05 people in a room of 400 would be shot per year, so 1 person per 20 years.
It'd 1 person every 2 years in a room of 4,000.
Also those mental health numbers are off given the lifetime prevalence of most disorders being around 5%.
2/400 (0.5%) of the population identifying as trans would be 1,665,000 people - which may be plausible but idk, I generally work on the figure of ~4% of any population being LBGTQI.
Poverty numbers are probably bang on.
Generally there are free trials or FOSS alternatives for most academic programs because academics are stingey af.
Cursory search showed Spin Works might suit your needs.