 Tulsa has diversified to capitalize on its status as a regional hub with substantial innovation assets . Products from Tulsa manufacturers account for about 60 % of Oklahoma 's exports , and in 2001 , the city 's total gross product was in the top one @-@ third of metropolitan areas , states , and countries , with more than $ 29 billion in total goods , growing at a rate of $ 250 million each year . In 2006 , Forbes magazine rated Tulsa as second in the nation in income growth , and one of the best cities in the country to do business with . Usually among the lowest in the nation in terms of cost of doing business , the Tulsa Metropolitan Area in 2005 was rated among the five lowest metropolitan areas in the United States for that category . 
