Household composition is changing nationally and Denver is a top example of the trend, a new report says.

The city experienced significant growth in the number of people living with roommates and other nontraditional households, according to a report released Tuesday from Apartment List called Reconfiguring the American Household.”

Denver saw 184.2% growth in households with roommates between 2007 and 2018, compared to a national growth of 28.1% in the same time period.

“Unrelated households are becoming increasingly common as more people find it culturally acceptable and economically viable to share their home with non-family members,” the report says.

The years between 2007 and 2018 were plagued by rising housing costs and spiking student debt which helped deprive young people of affordable housing options, according to the report.

Young people responded by choosing to move back in with parents or living with roommates rather than a spouse or children.  Fifty years ago, over 75% of 26-year-olds in the country were married and living with their spouse, while today that number is 24%.

“Across the country, the nuclear family household is slowly disappearing,” the report says. “Housing costs are rising quickly, especially in booming, urban job hubs and for those at the lower end of the income distribution. As rents continue to go up, roommates and coliving arrangements become even more appealing and we expect to see households grow or merge to afford available housing.”