From the National FWS...
Those that observed wildlife outspent fishing and hunting.

Preliminary data from the 2006 National Survey of Fishing, Hunting and
Wildlife-Associated Recreation shows the importance of wildlife-related
recreation to the American people. Of all Americans age 16 or older, 

*        30 million or 13 percent fished and spent $41 billion on their activities, 
*        12.5 million or 5 percent hunted and spent $23 billion, and 
*        71 million or 31 percent observed wildlife and spent $45 billion. 


http://www.fws.gov/news/newsreleases/showNews.cfm?newsId=3FCF5C3E-
9D8A-682C-8154BFD40A3656AF

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