U.S. crude oil exports averaged 1.1 million barrels per day (b/d) in 2017 and 1.6 million b/d so far in 2018, up from less than 0.5 million b/d in 2016. This growth in U.S. crude oil exports happened despite the fact that U.S. Gulf Coast onshore ports cannot fully load Very Large Crude Carriers (VLCC), the largest and most economic vessels used for crude oil transportation. Instead, export growth was achieved using smaller and less cost-effective ships.