World Tax Revenue Chart
Current World Tax Revenue: 15.05% GDP
World Tax Revenue for Dec 2015
Mean: 14.27% GDP
Median: 14.20% GDP
Min: 13.14% GDP (Dec 2009)
Max: 15.63% GDP (Dec 2000)

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

Source: World Bank > World > World Tax Revenue