Carol Morello's article at the Washington Post is linked below.
Washington Post: 2013 U.S. Population Growth Rate on Par with Depression-Era Numbers
"The last time the nation grew at a slower pace was in the heart of the Great Depression, from 1932 to 1937, according to an analysis by demographer William Frey of the Brookings Institution.
The recession led more women to postpone childbirth and fewer immigrants to come seeking jobs. As a result, the nation’s growth rate, which was just shy of 1 percent as recently as 2006, began sliding after the recession began the following year. With the economic downturn officially over for four years now, some demographers expressed surprise that the population growth rate registered a decline."
---Carol Morello, Washington Post