This database reports the number of nonimmigrant admissions (I-94 only) by selected category of admission and region and country of citizenship by federal fiscal year (Oct. 1-Sept. 30). Nonimmigrant admissions refer to arrivals of persons who are authorized to stay in the United States for a limited period of time . Most nonimmigrants enter the United States as tourists or business travelers, but some come to work, study, or engage in cultural exchange programs. See additional details on admissions categories and geographic definitions.