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CHEYENNE, Wyo. (AP) — U.S. Census Bureau estimates show a continued loss of population in Wyoming between July 1, 2016, and July 1, 2017, despite a recovering state oil industry.

An analysis by the state Economic Analysis Division released Thursday finds that Wyoming cities located in regions with large mineral extraction lost the most residents during the period.

Casper, which has a large energy industry economy, lost about 1,000 residents, while Cheyenne and Laramie, which aren’t so dependent on the energy industry, gained slightly. Gillette, in the heart of coal country, lost about 1,700 residents.

Because of the downturn in the energy industry, Wyoming’s total population in 2017 was nearly 5,600 less than the previous year, a 1 percent drop. The analysis says that’s the largest decline since 1989.