A Dynamic System

A Dynamic System

America's transportation system continues to change along with the population, labor force, and economy. The following table puts these changes in perspective.

Excel | CSV

The American Landscape--Population, Labor Force, and Economy: 1990 and 2010

  1990 2010
Resident population (thousands) 248,791 308,745
Total areaa (thousand sq. mi.) 3,718 3,797
Total civilian labor force (thousands) 125,840 153,889
Real gross domestic productb (trillions) $8.0 $13.1
Median household incomeb,c $41,430 $44,545
Average household incomeb,c $44,122 $56,289
Average household expendituresb,c $39,320 $43,298
Number of households (thousands) 94,312 118,682
Life expectancy at birth (years) 75.4 78.3d

aTotal area updated every 10 years.

bData are in 2005 chained dollars (see Glossary for definition).

cAdjusted to chained dollars by BTS in October 2011.

dEstimated by the Bureau of the Census as part of the 2008 National Population Projections.

Sources: Population, Area, Households, Median Income—U.S. Department of Commerce, Bureau of the Census. Average Income, Labor Force, Expenditures—U.S. Department of Labor, Bureau of Labor Statistics. GDP—U.S. Department of Commerce, Bureau of Economic Analysis. Life expectancy—U.S. Department of Health and Human Services, Centers for Disease Control and Prevention and U.S. Department of