1994 Poll On Vegetarian Population
Frequency of consumption of various meat and dairy products, including differences by age, gender, ethnic group, and geographical location.
This 1994 poll states that 0.3-1% of the population are behavior based vegetarians (do not eat meat, fish or poultry), which is significantly lower than the 3-7% who consider themselves vegetarian or the 20-30% that buy vegetarian products.
About 6% of the population does not eat red meat, 3% never eat poultry, 3% never consumer dairy products, 4% never eat eggs, and 4% never eat seafood.
5% of males never eat meat, while 7% of females do not eat red meat.
http://www.vrg.org/nutshell/poll.htm