On Apr 27, 6:40 pm, "Matt Barrow"
wrote:


I have seen this 30%/70% number repeatedly, but I don't remember it
ever came from a scientific survey, or just someones rough estimate.

FAA figures.


Care to provide the source (URL of the original data)?


That has contributed to the big decline of
overall 100LL consumption in U.S.

Do you have a cite for that last one?

What's the GA activity level over the past few years?

Year US Avgas production and import (thousand barrels)
1999 7485
2000 6648
2001 7121
2002 6584
2003 6255
2004 6295

source:
http://www.indexmundi.com/en/commodi...ly_monthly.htm