Tax revenue - Country rankings:
The average for 2017 was 18.04 percent.The highest value was in Denmark: 33.32 percent and the lowest value was in the United Arab Emirates: 0.07 percent. Below is a chart for all countries where data are available for: Tax revenue.
Tax revenue, percent of GDP, 2017
(percent, Source: The World Bank, TheGlobalEconomy.com)