Bluebulb Projects' The Measure of Things presents:
78 is about three-fifths the number of Union Stations in the United States.
In other words, it's 0.5780 times the count of Union Stations in the United States, and the count of Union Stations in the United States is 1.730 times that amount.
(a.k.a. Union Terminal; a.k.a. Joint Station; a.k.a. Union Depot) (2016 figures)