The state does not produce any petroleum of its own but boasts the largest oil refinery of any non-oil-producing state, the Pine Bend Refinery. As of 2001, Minnesotans were using a total of of gasoline per day, and fuel use rises in the region by about 2% annually. About 70% of the gasoline fuel used in the state comes from Pine Bend and the nearby St. Paul Park Refinery, while most of the rest comes from a combination of the Mandan Refinery in North Dakota, and the Superior Refinery in Superior, Wisconsin. 40 to 50% of Pine Bend's output is used within the state. Flint Hills is currently planning a $100 million expansion to increase capacity at the plant to about . Petroleum from the north comes to the state through one of the longest pipelines in the world, the Lakehead Pipeline and the Minnesota Pipeline. Additional crude comes from the south via the Wood River Pipeline.