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The nearly forty tribes located in Oklahoma, including the Chickasaw Nation and the Seminole Nation, operate numerous businesses and generate billions of dollars in revenue. A student in an economics class is researching the tribes' collective activity as a single industry. The student wants to compare that industry's contribution to Oklahoma's overall economy in 2017 with the contributions made by three other industries in the state. Looking at the table, the student finds that tribal economic activity totaled over $7.3 billion, ranking it above ________