Thirty-six percent of U.S. Millennials -- that's 21.6 million young adults -- were living in their parents’ homes in 2012, according to a new Pew Research Center report. This is the highest share in nearly four decades, said the study.

The percentage of young adults living with their parents remained fairly steady for the four decades prior to 2007, hovering between 31 percent and 32 percent, but spiked to 36 percent in 2012.

Younger Millennials (ages 18-24) were much more likely to live with their parents than those that were older (ages 35-31), as were those Millennials with less education. The exception to the latter were people still in college.

Here’s an infographic with more insights: