Adjusted gross income, exemptions, deductions, and tax items.

Income limits and mean income for each quintile of household income, 1967 through 2018.

Historical itemized charitable contributions (nominal amounts) and adjusted gross income, 1917-2017.

Income tax as a percent of adjusted gross income, by size of adjusted gross income and type of return.

Number of households, average pretax and after-tax income, shares of pretax and after-tax income, and income category minimums for households with children, by household income category, 1979 to 2016

Shares of federal tax liabilities for nonelderly childless households, by comprehensive household income quintile, 1979 to 2016.

Average federal tax rates for households with children, by comprehensive household income quintile, 1979 to 2016.

Historical percentage of individual income tax returns, classified by the highest applicable statutory marginal rate, 1958-2016.