Oligopolies: Boeing famously gambled the company on the 747 and was rewarded for success with a production program that has run for half a century. There was a time when the American aerospace industry alone had civil airframe offerings from companies including Boeing, Douglas, Lockheed, Convair, Martin and Fairchild. Today, the market has been distilled to two major airframers: Airbus and Boeing. Speaking at the firm's annual investor conference last week, Boeing Company CEO David Calhoun stated that the next clean sheet Boeing commercial airliner will not be introduced until the middle of the next decade. Instead, Boeing will continue to iterate the 737 families, and develop the newest versions of the 787 Dreamliner and the 777, which is expected to win a considerable share of the replacement market for four-engine heavyweights, mainly the Airbus A380 and Boeing's own 747.But the real battle in commercial aviation is in narrow bodies. Boeing's order book is backlogged to the tune of just over 5,000 aircraft, of which over 80 percent are 737 models. Find the market operations and market analysis about it (graph and explanation)