U.S. average daily crude exports plummeted 36 percent to about 320,000 barrels a day in November, the last full month in which restrictions on such shipments were in effect, according to Bloomberg calculations from data released today by the Census Bureau. It was the lowest volume of U.S. crude exports since May 2014, when producers shipped about 309,000 barrels a day abroad. The decline in November may be attributed to new movements on a pipeline that allowed Valero Energy Corp.’s refinery in Quebec to curb its imports from the U.S. Gulf Coast, according to Bloomberg Intelligence analyst Gurpal Dosanjh. The line “was reversed in November, which allowed the refinery to source crude by pipe, and which cut U.S. exports,” he said in an e-mail. The U.S., now the world’s largest oil and gas producer, last month repealed its 40-year-old trade restrictions on crude exports, established during the energy-supply shortages […]