| Year | Percentage of 1900 real GDP per capita | Percentage of 2010 real GDP per capita |
| 1900 | 100% | 13% |
| 1920 | 136 | 18 |
| 1940 | 171 | 23 |
| 1980 | 454 | 60 |
| 2000 | 696 | 92 |
| 2010 | 758 | 100 |
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Data from: Angus Maddison, Statistics on World Population, GDP, and Per Capita GDP, 1–2008AD, “The First Update of the Madison Project: Reestimating Growth Before 1820,” http://www.ggdc.net/maddison; Bureau of Economic Analysis. |
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