CHEYENNE –  The U.S. Census Bureau released the 2010 Census state population counts. This is the first set of population data released from the 2010 Census, which was conducted during the spring and summer months in order to count every person living in the United States. This count is mandated by the U.S. Constitution to occur every ten years. Wyoming’s total resident population reached 563,626 on April 1, 2010. Wyoming gained 69,844 persons over the decade, or a 14.1% increase since 2000. This is the strongest growth Wyoming has seen since 1980. From 1970 to 1980, Wyoming’s population grew by 41.3%. Wyoming experienced an energy boom during the 1970s and early 1980s. When the last recession hit Wyoming, in the mid-1980s, the State endured heavy out-migration and the population declined 3.4% from 1980 to 1990. In 2010, the U.S. population reached 308.7 million, an increase of 9.7% from 2000.