But that is no longer the case, according to a new study by the U.S. Census Bureau.

"There are now more young people living with their parents than in any other arrangement," says the Census Bureau study.

"What is more," says the study, "almost 9 in 10 young people who were living in their parents' home a year ago are still living there today, making it the most stable living arrangement."

The Number 1 living arrangement today for Americans in the 18-to-34 age bracket, according to the Census Bureau, is to reside without a spouse in their parents' home.