Excel viewer Congressional district data Congressional district data show selected income and tax items classified by State, congressional district, and size of adjusted gross income. Data are based on individual income tax returns filed with the IRS. The data include items, such as: Number of returns, which approximates the number of households Number of personal exemptions, which approximates the population Adjusted gross income Wages and salaries Dividends before exclusion Interest received Tax years 2021 2020 2019 2018 2017