USA Research and development expenditure - data, chart | TheGlobalEconomy.com

The USA: Research and development expenditure, percent of GDP: The latest value from 2021 is 3.46 percent, a decline from 3.47 percent in 2020. In comparison, the world average is 1.25 percent, based on data from 78 countries. Historically, the average for the USA from 1996 to 2021 is 2.74 percent. The minimum value, 2.45 percent, was reached in 1996 while the maximum of 3.47 percent was recorded in 2020.

美国：研究与开发支出占国内生产总值比例：截至2021年的最新数据为3.46%，较2020年的3.47%有所下降。相比之下，基于来自78个国家的数据，全球平均水平为1.25%。从1996年至2021年的历史数据来看，美国的平均比例为2.74%，其中最低值为1996年的2.45%，最高值为2020年的3.47%。