The Commonwealth Fund recently published the results of a study comparing the health systems of 11 high-income countries. Some of the factors considered in the study are affordability, administrative efficiency, equity, and health care outcome. The U.S. ranked the last at number 11. Despite healthcare spending as a percentage of GDP being the highest, the US performed poorly in terms of system performance, outcome, etc.
The following chart shows the Health Care Spending as a Percentage of GDP for Select High-Income Countries from 1980 to 2019:
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Source: Mirror, Mirror 2021: Reflecting Poorly, The Commonwealth Fund
The entire report has many other interesting facts.