From the article:
America's population is growing at its slowest rate in decades, and the sluggish economy is mostly to blame, according to one expert.
The U.S. population grew by just 0.72 percent in the year ended July 1, 2013, the Census Bureau reported Monday. That’s the slowest growth rate since 1937.
Indeed, this recent period of economic malaise has been plagued by low birth rates, fewer marriages and limited mobility, especially for America’s young people. Typically in a strong economy, workers and immigrants travel to where the jobs are, but the Census data show they’re not really moving, Frey said.
U.S. population growth is expected to slow even more in the next few decades, though that’s largely not attributable to a weak economy, Frey said. Instead, the slow growth will mostly be the result of an aging population.