The NYC originated a lot more coal than you think. It's lines in central PA
were almost as extensive as the PRR's.

Quoting from the 1948 annual report, coal as a percent of:

Carloads - 30.4%
Tonnage - 43.0%
Revenue - 20.2%
Car fleet - 45.3% all open tops, including gons

This does not include coal off the P&LE unless it came in interchange.

I might also add that the anthracite portion of the coal business was around 15%.

Dave Staplin