The University of Southern California (USC[a] or SC) is a private, not-for-profit, and nonsectarian research university founded in 1880 with its main campus in the city area of Los Angeles, California. As California's oldest private research university, USC has historically educated a large number of the region's business leaders and professionals. In recent decades, the university has also leveraged its location in Los Angeles to establish relationships with research and cultural institutions throughout Asia and the Pacific Rim. An engine for economic activity, USC contributes approximately $5 billion annually to the economy of the Los Angeles county area. As of 2014, the university has produced the fourth largest number of billionaire alumni out of all undergraduate institutions in the world. In 2011, USC was named among the Top 10 Dream Colleges in the nation. It holds a vast array of trademarks and wordmarks to the term "USC." For the 2015-2016 academic year, there were 19,000 students enrolled in four-year undergraduate programs. USC is also home to 23,000 graduate and professional students in a number of different programs, including business, law, social work, and medicine. The university has a "very high" level of research activity and received $687 million in sponsored research from 2015 to 2016. USC counts six Nobel Laureates, eight Rhodes Scholars, three MacArthur Fellows, 181 Fulbright Scholars, one Turing Award winner, 78 Academy Award winners, 119 Emmy Award winners, three winners of the National Medal of Arts, one winner of the National Humanities Medal, three winners of the National Medal of Science, and two winners of the National Medal of Technology and Innovation among its alumni and faculty. Additionally, of its current faculty, 15 are members of the National Academy of Sciences, 17 are members of the Institute of Medicine, 34 are members of the National Academy of Engineering, 92 are members of the American Association for the Advancement of Science, and 32 are members of the American Academy of Arts and Sciences. In 1969, it joined the Association of American Universities. USC sponsors a variety of intercollegiate sports and competes in the National Collegiate Athletic Association (NCAA) as a member of the Pacific-12 Conference. Members of the sports teams, the Trojans, have won 100 NCAA team championships, ranking them third in the nation, and 378 NCAA individual championships, ranking them second in the nation. Trojan athletes have won 287 medals at the Olympic games (135 golds, 87 silvers and 65 bronzes), more than any other university in the United States. If USC were a country, it would rank 12th in most Olympic gold medals.