Over a third of America's young women live at home with their parents or relatives – a percentage not seen since 1940 – as more millennial women put off marriage, attend college, and face high living expenses, according to Pew Research Center.

Analysis of data from the US Census Bureau showed 36.4 percent of young women aged 19-34 living with parents or relatives, compared to 36.2 percent in 1940.

The number of young men living with their parents is also on the rise. Pew discovered that 42.8 percent of young men are currently staying with family or relatives, compared to 47.5 percent in 1940. Pew said the results showed a striking U-turn, "indicating a return to the past, statistically speaking."