Q. Number of Vehicles per Household in the US
You can find vehicle availability and usage statistics for the years 1969, 1977, 1983, 1990, 1995, and 2001 in the National Household Travel Survey Summary of Travel Trends at http://nhts.ornl.gov/2001/pub/STT.pdf. See Tables 17-23 (pp.32-41).
You can find similar data for the 2009 NHTS starting with table 17 at http://nhts.ornl.gov/2009/pub/stt.pdf
More current statistics are available through the Census Bureau's American Community Survey (ACS): http://www.census.gov/acs/www/index.html.
For assistance with obtaining this data, please contact the Census Bureau directly at 1-888-456-7215 or email@example.com.
See also more 2009 National Household Travel Survey (NHTS) data: