GDP per capita has doubled since 1975 in inflation-adjusted dollars according to this: http://www.multpl.com/us-real-gdp-per-capita/table/by-year http://www.mu

GDP per capita has doubled since 1975 in inflation-adjusted dollars according to this: http://www.multpl.com/us-real-gdp-per-capita/table/by-year http://www.multpl.com/us-real-gdp-per-capita/table/by-year