It had interests in 14 plants in Asia, Europe and the U.S., and achieved production of 9.7 million metric tons in 2019.[139] On 30 June 2020, BP sold all its Alaska upstream operations and interests, including interests in [[Prudhoe Bay Oil Field], to Hilcorp Energy for $5.6 billion.[140][141] On 14 December 2020, it sold its 49% stake in the Trans-Alaska Pipeline System to Harvest Alaska.[142][143]