|Income group||Trips per person||SE|
|Less than $25,000||5.6||0.24|
|$25,000 to $49,999||9.0||0.27|
|$50,000 to $74,999||11.3||0.35|
|$75,000 to $99,999||11.8||0.42|
|$100,000 or more||13.2||0.36|
KEY: SE = standard error.
NOTE: Excludes trips where income was not reported.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and Federal Highway Administration, 2001 National Household Travel Survey data, CD-ROM, February 2004.