Part of the State University of New York system, Stony Brook University encompasses 200 buildings on 1,450 acres. Since welcoming its first incoming class in 1957, the University has grown tremendously, now with nearly 25,000 students and 2,200 faculty. Its membership in the prestigious Association of American Universities (AAU) places Stony Brook among the top 63 research institutions in North America. U.S. News & World Report ranks Stony Brook among the top 50 public universities in the nation, and Stony Brook recently ranked 78th in the Times Higher Education World University Rankings. One of four University Center campuses in the SUNY system, Stony Brook University co-manages Brookhaven National Laboratory, putting it in an elite group of universities that run federal research and development laboratories. As the largest single-site employer on Long Island, Stony Brook is a driving force of the regional economy, with an annual economic impact of $4.65 billion, generating nearly 60,000 jobs, and accounts for nearly 4% of all economic activity in Nassau and Suffolk counties, and roughly 7.5 percent of total jobs in Suffolk County.