My guess is that a lot of pertinent financial data is already out there waiting to be "discovered" and put to use. NSIA may well be able to point out the various sources - particularly Governmental - and may well have that info extracted and available for use.

Have you looked at the study and report accomplished for WDFW by TCW entitled "Economic Analysis of the Non-Treaty Commercial and Recreational Fisheries in Washington State" and dated 2008? See it at: http://wdfw.wa.gov/publications/pub.php?id=00464. Note that the values are in 2006 dollars.