Use normalized data in Household sizes choropleth map

It's visually inaccurate to map raw counts as a choropleth. What is mapped here essentially represents the population of those counties, since counties with high populations have a high # of households. I'd suggest either making a proportional symbol map, if you want to display the count of households, or normalizing the data you're mapping (e.g., show housing density: households per m2) - see section 4 here, and this article

Or maybe map the % of households that are low income, if those data are available?