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Introduction
America's transportation system continues to change along with the population, work force, and economy. The following table puts those changes in perspective:
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| Resident population (thousand) |
248,791 |
301,621 |
| Total area (thousand sq. mi.) |
3,718 |
3,794 (2000) a |
| Total civilian labor force (thousand) |
125,840 |
153,124 |
| Real gross domestic productb (trillion) |
$7.1 |
$11.5 |
| Median household incomeb,c |
$36,668 |
$41,924 |
| Average household incomeb,c |
$39,073 |
$51,929 (2006) |
| Average household expendituresb,c |
$35,257 |
$42,204 (2006) |
| Number of households (thousand) |
93,347 |
116,011 |
| Life expectancy at birth (years) |
75.4 |
77.8 (2005) |
a Data for 2000 include inland water, coastal water, Great Lakes, and territorial water. The Census Bureau tabulates area data for the decennial census years only.
b Data in 2000 chained dollars (see Glossary for definition).
c BTS computations, November 2007 and October 2008.
Sources: Area - U.S. Department of Commerce (USDOC), U.S. Census
Bureau, Statistical Abstract of the United States: 2002 and 2008, available
at www.census.gov as of October 2008. GDP - ;USDOC, Bureau of Economic
Analysis, available at www.bea.gov as of October 2008. Population,
number of households, and median household income - USDOC, Census,
available at www.census.gov as of October 2008. Average household
income and expenditures, and labor force - U.S. Department of Labor,
Bureau of Labor Statistics, available at www.bls.gov as of October 2007.
Life expectancy - Centers for Disease Control and Prevention, available at www.cdc.gov as of October 2008.
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