Back to the topic at hand:
Number of refineries in the U.S.: 149
Number of refineries in 1981: More than 300
Capacity growth since 1981: -10%
Gasoline consumption since 1981: +45%
Gasoline imported from other countries: 10% of total consumption
Last NEW oil refinery build it the US: 1976
Number of refineries in the process of getting built: 1
From the New York Times:
No New Refineries in 29 Years? There Might Well Be a Reason