The PBA Tour is the major professional tour for ten-pin bowling, operated by the Professional Bowlers Association. Headquartered in Chicago, Illinois, over 3,000 members worldwide make up the PBA. While most of the PBA members are Regional professionals, a small percentage of the bowling membership competes at the national and international level, forming the PBA Tour. (PBA.com lists 82 bowlers that have national touring pro status.) Founded in 1958, the PBA Tour has been in continuous operation since the inaugural 1959 season.