 For every decade between 1950 and 2010, the growth rate of the Desert Southwest was at least twice as great as that for the United States as a whole. And in three of those periods, the growth rate in the region was at least triple the U.S. growth rate: 1950 to 1960, 1970 to 1980, and 1980 to 1990. In fact, in each of those decades, the growth rate of the Desert Southwest exceeded 40 percent.
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