US refiners in the Gulf Coast imported 26.4 MMbbls (million barrels) of crude oil in April 2015—compared to 20.5 MMbbls in March 2015 from Saudi Arabia, according to data from the U.S. Customs and Border Protection. This is the highest level of imports in the past year. The US imported 3.63 MMbpd (million barrels per day) of crude oil through waterways for the week ending May 1. The slowing US output means that crude oil imports will increase more. As a result, declining US supplies will support WTI (West Texas Intermediate) oil prices.