Pacific BlueFin Tuna - Real Data -

This is directly from the NOAA website:

"Other management organizations, like the Western Central Pacific Fisheries Commission (WCPFC) are also considering additional conservation and management measures. U.S. fisheries generally harvest a small fraction of the total Pacific-wide bluefin harvest, and represent only two percent of the average annual landings from all fleets fishing in the Eastern Pacific Ocean."

2% of the catch from the US

2%

Read for yourself:
http://www.fishwatch.gov/seafood_profiles/species/tuna/species_pages/pac_bluefin_tuna.html