Curious, how many coal cars or sets does BNSF own?

Curious, how many coal cars or sets does BNSF own? I do not know for a fact, some where I heard or read BNSF had something like 700 sets of coal cars. Where can I find a source for this information?

Best regards,
Swafford

Yes and I would like to know how many coal trains a day leave the pacific northwest for the mid west and east? Thanks George P.S. anything east of SAn Diego is EAST!!