| 1960 | 2011 | |||
| Real GDP per capita (2005 dollars) | Percentage of U.S. real GDP per capita | Real GDP per capita (2005 dollars) | Percentage of U.S. real GDP per capita | |
| Argentina | $6,585 | ? | $13,882 | ? |
| Ghana | 1,557 | ? | 2,349 | ? |
| South Korea | 1,610 | ? | 29,618 | ? |
| United States | 15,136 | ? | 42,244 | ? |