This layer represents the percent householders spend on housing costs. It uses ACS table DP04 Housing Characteristics. There are three categories under " Selected Monthly Costs as as percentage of household income" for households with mortgages, without mortgages and rentals. Percentages are presented for households spending great than 30 percent of their income on housing costs. A detailed description is available here: https://fortress.wa.gov/doh/wtn/WTNPortal#!q0=4742