This is an interesting point and worth looking in to more. Thanks for making it a Google sheet (I don't have Excel.) I'm no demographer, but my intuition is t

This is an interesting point and worth looking in to more. Thanks for making it a Google sheet (I don't have Excel.) I'm no demographer, but my intuition is that the shift from 44% to 40% is not likely due to an increase in single-income households that are also buying homes. I think over the last 30 years that number would get squeezed a bit on both ends: * Boomers are retiring causing some dual-income households to become 0-income households. Indeed, the proportion of 0-income households has gone up about 4% over the same period. * Millenials are marrying later, causing them to be reported as "single income households" far later in life than in previous generations. For instance, I'm still single at an age when my father owned a home and had 3 kids (on a single income). As mentioned previously, I'm in no position to buy a home right now. While I constitute a "household" under the census designation, my original comment was more referring to a traditional marriage or domestic partnership that would be in the market to buy a home. If we could normalize the data to such couples (say working-age partners in a relationship) I think we'd see the trend of dual-income households that matches my anecdotal observations.