The latest American Community Survey—a yearly estimate of the demographics of cities conducted by the U.S. Census—continues to reveal alarming things about the state of renting in San Francisco.

Real estate site Zillow surveyed data collected by the census to figure out how many Americans now live in “doubled up households.”

“We define a doubled-up household as one in which at least two working-age, unmarried or un-partnered adults live together,” according Zillow. “For example, a 25-year-old son living with [...] parents would constitute a doubled-up household, as would two 23-year-old roommates who are not partnered to each other.”

Chances are that people in doubled-up homes are living together mostly out of economic necessity.

While not everyone living with roommates or family does so because they have no choice, a stark increase in such living arrangements indicates people are having trouble making ends meet on their own.

Nationally, 30.2 percent of adults lived with roommates in 2016. That’s up from 26.7 during the last full census in 2010.

That’s up from 26.7 during the last full census in 2010. In San Francisco, it’s a more startling 38.5 percent. That’s a spike from 35.3 percent in 2010, a smaller increase than the national trend. But going back to 2005, the number of dual households in the city rose drastically, up from 26.9 percent.

That’s a spike from 35.3 percent in 2010, a smaller increase than the national trend. But going back to 2005, the number of dual households in the city rose drastically, up from 26.9 percent. That’s more than half of all renters in the city. Not mentioned in the Zillow report is that the 38.5 percent figure is equivalent to more than 60.9 percent of the city’s total renter population in the most recent ACS. (We should note that not every San Franciscan living with roommates or family are necessarily renters.)