See here www.oas.org/en/iachr/reports/pdfs/violencelgbtipersons.pdf
"Some Latin American organizations report that the average life expectancy of trans
women in the region is as low as 35 years of age, or even less.772 In this regard, the
IACHR has noted that while it seems that gay men of all ages are targeted, in the
case of trans women, it is mostly younger trans women who are victims of
violence. The IACHR has expressed concern about the young age of trans victims of
killings and other acts of violence. According to the data collected, 80% of trans
persons killed were 35 years of age or younger"
Footnote 772
"Exact figures vary according to sources and countries. See, among others: IACHR, Hearing on Trans Persons'
Right to Identity, 144th Period of Sessions, March 23, 2012; IACHR, Minutes of Meeting of Experts on Violence
against LGBTI Persons in the Americas, Washington DC, February 25-25, 2012; REDLACTRANS, La Transfobia
en América Latina y el Caribe, 2009, p. 63; [Argentina] Instituto Nacional contra la Discriminación, la
Xenofobia y el Racismo (INADI), Políticas inclusivas para el colectivo trans, 2013; [Guatemala] Organización
Trans Reinas de la Noche, REDLACTRANS, IGLHRC, Heartland Alliance and The George Washington University
Law School International Human Rights Clinic, Human Rights Violations of Lesbian, Gay, Bisexual,and
Transgender (LGBT) People in Guatemala: A Shadow Report, March 2012, p. 16; [Uruguay] Ministerio de
Desarrollo Social, Políticas públicas y diversidad sexual: Análisis de la heteronormatividad en la vida de las
personas y las instituciones. Informe final, June 2013, p. 135. In a 2005 study conducted in Argentina
analyzing the death of 420 trans persons (travestis), 70% of them were between 22 and 41 years of age at
the time of their death. Berkins, Lohana, “Travestis: una identidad política” in Pensando los feminismos en
Bolivia, Conexión Fondo de Emancipación, 2012, p. 224"
Nothing there suggests anything other than 'most homicide victims are aged under 40'. But that's likely to be true for any group.
There doesn't seem to be any data on transgender life expectancy at all. I suspect what you could do is adjust the general life expectancy down for risk factors such as homicide (for sex workers - doesn't appear to apply more generally) and HIV (much higher among transwomen)
This is not about transwomen
www.politifact.com/rhode-island/statements/2015/may/31/rebecca-quigley/does-becoming-prostitute-mean-youve-only-got-about/
But it very neatly dispels the self same logical fallacy.
As noted there a prostitute may have a 1% chance of being murdered in her life time. And if she is murdered at 30 rather than living to 80 then that's (80-30)*1% = six months off her life expectancy due to murder.
It's likely that prostitutes have lower relative life expectancy than that due to things like drug use, poor health, etc. But clearly the threat of murder is itself not a big factor in actuarial life expectancy.
And btw if you look at life expectancy between rich and poor there's already a huge gap, e.g. 7 years between Manchester and Kensington & Chelsea.
You'd expect middle class transwomen such as Caitlyn Jenner or Jane Fae to have middle class life expectancy, and you'd expect poor transwomen in the Brazilian favela to have Brazilian favella life expectancy.
But there doesn't seem to be any reason to believe that transwomen have significantly lower life expectancy than others, except in respect of HIV.
This relatively recent study of MSM
www.ncbi.nlm.nih.gov/pmc/articles/PMC3093261/
found that the HIV-related death rate among MSM was 157* higher than men who did not have sex with men.
Note however that the actual number of HIV deaths in the study was quite small (25 deaths), so to come up with very reliable numbers you'd need a vast study.
So the risk to TW would seem to be not from murder or suicide but from anal sex (given that receptive anal sex has 20* the transmission rate of receptive vaginal sex, and if they are also giving then they will pass that on very easily) . However note that when taking PrEP HIV transmission is all but impossible
So MSM, including non-op TW, are at base high risk from HIV, but in functioning health care systems that may not be such an issue any more.
I believe for example in Thailand there is cheap PrEP for TW sex workers.
Obviously 'lesbian' TW are not going to have any kind of elevated HIV mortality.
I don't know what the HIV transmission is like for post-op TW but I would guess it's high, so post-op TW sex workers may be at high risk.