Bluebulb Projects' The Measure of Things presents:
70 is about half the number of Union Stations in the United States
In other words, it's 0.5190 times the count of Union Stations in the United States, and the count of Union Stations in the United States is 1.930 times that amount.
(a.k.a. Union Terminal; a.k.a. Joint Station; a.k.a. Union Depot) (2016 figures)