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In 2025, the share of the global gross domestic product (GDP) adjusted for purchasing power parity (PPP) in the United States was 14.63 percent. Between 1980 and 2025, the figure dropped by 6.97 percentage points, though the decline followed an uneven course rather than a steady trajectory. The forecast shows the share will steadily decline by 0.92 percentage points from 2025 to 2031.

This indicator describes the share of a country's gross domestic product in the global gross domestic product. To this end the GDP (indicating the total value of final goods and services produced during a year) has been adjusted for purchasing power parity and set in relation to the purchasing power adjusted global GDP value.