Tax revenue - Country rankings:
The average for 2016 was 17.68 percent.The highest value was in Iceland: 38.52 percent and the lowest value was in the United Arab Emirates: 0.04 percent. Below is a chart for all countries where data are available for: Tax revenue.
Tax revenue, percent of GDP, 2016
(percent, Source: The World Bank, TheGlobalEconomy.com)