How much of every dollar do Seattleites spend on housing?

Quick mashup of census and Zillow housing data shows every Seattle zip code is over-spending on housing. My mark? The FHA maximum for debt-to-credit ratio, which is 31% (meaning borrowers shouldn't spend more than $0.31 of every dollar on housing).

Take a gander at the chart below, or click to view it on Tableau Public.