Research on Flag Sales

Question: 

Hello!
      I was admiring your flag website. I am a student starting at Harvard Business School and am researching the amount of US and other flag sales in the US annually (both real flags as well as flag images). Might you or any of your colleagues know any resources I might check out?
Kind regards,
Michelle

Answer: 

Dear Michelle:


     I do not know the answer to your question, but it is an interesting one. With your permission, I would like to forward it to the questions-and-answers page of www.nava.org, where one of the members of the North American Vexillological Association may know how to answer your question.
Very truly yours,
Charles Spain FIAV Secretary- General

(Mr. Spain is past-president of NAVA...Ed)