The average weight of Americans has increased over the last 30 years.
I want to know the average weight of a passenger on major US airlines
over this time period (annual data) and the calculated  increase in 
jet fuel use because of this increased weight.

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Request for Question Clarification by keystroke-ga on 28 Jul 2006 12:31 PDT

Have you tried speaking directly to AA to see if they can give you the information?

--Keystroke-ga

I doubt that Alcoholics Anonymous would be of much assistance.  :-P

(Irony: I've just returned from the bar.)

These sites may help:
http://www.smh.com.au/articles/2003/05/13/1052591790259.html
http://www.livescience.com/humanbiology/obesity_airlines_041105.html
http://www.ainonline.com/publications/RAA/RAA_04/raa_arcweighsp8.html

WHile these sites agree in mentioning an increase of 10 lb per
passenger, I note that the last one speaks of "passenger weight with
carry-on baggage".  Those laptops add up, as does perhaps the weight
of other carry-on baggage as more passengers avoid checking baggage. 
This site also mentions a relatively greater increase in women's
weight (hold off, girls!), but they are certainly carrying more
laptops than they used to.

http://transcripts.cnn.com/TRANSCRIPTS/0305/12/se.14.html
http://www.popsci.com/popsci/aviationspace/fc6989c49db84010vgnvcm1000004eecbccdrcrd.html
http://www.aviationtoday.com/sia/20010401.htm
http://www.ahherald.com/bishop/2006/gb060525_fat_people.htm

Even in Russia, they are talking about the problem:
http://newsfromrussia.com/science/2004/11/05/57002.html

This is about marine vessels, but the weight problem is the same:
http://www.ntsb.gov/Events/journalist/lessons/LL_MARINE_OUT_OF_DATE_WEIGHT_STANDARDS.TXT

Somewhere in the above, there is also mention of the additional fuel required.