US Tax Revenue Chart
Current US Tax Revenue: 10.93% GDP
US Tax Revenue for Dec 2014
Mean: 10.85% GDP
Median: 10.75% GDP
Min: 7.94% GDP (Dec 2009)
Max: 12.93% GDP (Dec 2000)

US tax revenue (percent of GDP). Excludes most social security contributions.

Source: World Bank > US > US Tax Revenue