The state is a large producer of natural gas, oil and food. It has large industries in aviation, energy, telecommunications, and biotechnology. The state has one of the fastest growing economies in the nation. Between 2005 and 2006, it had the third highest percentage of income growth and the highest percentage in gross domestic product growth. Oklahoma City and Tulsa are the main economic areas of Oklahoma. Almost 60 percent of Oklahomans live in these two metropolitan statistical areas.