Health Insurance revenue and tax rates as a percentage of the Old-Age, Survivors, Disability Insurance (OASDI) tax/contributions from 1966 to 2018.
Average and marginal employee Social Security and Medicare (FICA) tax rates for two-parent families of four at the same relative positions in the income distribution from 1955 to 2015.
Historical Combined Income and Employee Tax Rates for a Family of Four, also including Employer Tax Rates from 1955 to 2014.
Share of wages paid in income and payroll taxes for selected years from 1970 to 2011.
Taxation of social security benefits by filing status and income, and changes effective in tax years 1984 and 1994.