The OECD’s annual Revenue Statistics report found that the tax-to-GDP ratio in the United States increased by 0.8 percentage points from 25.8% in 2020 to 26.6% in 2021. Between 2020 and 2021, the OECD average increased from 33.6% to 34.1%. The tax-to-GDP ratio in the United States has decreased from 28.3% in 2000 to 26.6% in 2021. Over the same period, the OECD average in 2021 was above that in 2000 (34.1% compared with 32.9%). During that period, the highest tax-to-GDP ratio in the United States was 28.3% in 2000, with the lowest being 22.9% in 2009.