The biggest items are....
33% Shelter
20% Transportation
20% Transportation
15% Food
Based on a 40 hour a week, 5 work days a week schedule the average time spent providing these items are...
Maintain Shelter - 2.5 hours a day -- 13 hours a week
Provide Transportation - 1.5 hours a day -- 8 hours a week
Gather Food - 1.25 hours a day -- 6 hours a week
(one could also factor in the overhead of getting to and from work)
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http://www.bikesatwork.com/carfree/cost-of-car-ownership.html
ftp://ftp.bls.gov/pub/special.requests/ce/share/2004/age.txt