The number of in-migrants to Arizona from elsewhere in the United States has displayed only a modest upward trend since the early 1980s. The in-migration rate—the number of in-migrants per 1,000 state residents—has dropped sharply over this period. In-migration is highly cyclical, rising during economic expansions and falling during recessions. After peaking during the state’s economic boom in 2005 and 2006, the number of in-migrants fell in each year from 2007 through 2010, a result of the state’s long and deep economic recession. The 2010 number was the lowest since 1983.