Again, census. The income data is collected from the IRS with some projections for non-filers worked in (actually if you click the article the calculator links to, it goes over some of these things). So you can make all those distinctions in the data. If you're comparing yourself to household income when that applies across the board, do you think you're really earning the same as a dual-income family with two kids that is also making 150k? Because I don't think you're in the same place financially as them at all.
Taxes are different for married people. Taxes are different for people with kids. Financial obligations, likewise, different. There is nothing good or bad about that, but there are differences. Trying to compare yourself on a level field to when there are differences in the variables results in an invalid comparison. So I compared you to singles. You're in the top few percent of income for singles.