income tax subsidies for pension benefits.
total itemized contributions (constant dollars), contributions as percent of AGI, and contributions as percent of GDP, from 1917-2009.
total itemized charitable contributions (nominal amounts), 1917-2009.
tax returns classified by highest applicable statutory marginal rate.
percentage of federal taxes generated at each statutory marginal rate.
value of benefit from dependent exemption, Head of Household filing status, Child Tax Credit, Earned Income Tax Credit, and Making Work Pay credit.
number of returns filed for each type of tax by state.
parameters for child tax credit and child and dependent care tax credit.
number of returns, shares of AGI and total income tax, AGI floor on percentiles, and average tax rates, by selected descending cumulative income percentiles and by state.
sources of income and tax items in current and constant dollars from 1913 to 2011.