This actually seems like it would make sense. 18-64 year olds probably comprise the overwhelming majority of infections. As they have in every single country.
Per this site:
New York Population and Demographics (New York, NY)
The 18+ age group in NYC is 77% of the population and the 65+ group is 11%. This basically boils down to 66% of the people in NYC being between 18 and 64.
Now, if you account for the fact that pretty much no one under 18 has died, then that means 74% of the people who died, did so from a population which comprises only ~11% of the ENTIRE population, infected or not!
And that goes back to the three graphs Rip has been showing... Those are per million statistics. There are far fewer millions of 65+ people than there are millions of 18-64 year olds. Yet, per million, the 65+ age groups are clearly outpacing everyone else by a very, very long shot.
As a whole though, the 18-64 year olds probably do, by their numbers, make up 26 percent.
It is a complete mistake, though, to simply say 26% of the dead folks are 18-65 without even acknowledging the massive population dynamic differences.