These tenants are putting more than 30% of their income toward housing costs, according to a new housing data report from the U.S. Census Bureau. The general rule is that people shouldn’t spend more than 30% of their earnings, before taxes, on housing.

That’s become more difficult to do. Rents have risen rapidly in the past few years. Nationally, tenants are paying about 25% for their rentals from 2016 through 2021, according to census data. However, incomes have increased only about 11% over the same period. (The rental data goes through only to 2021.)