Ohio State's political science department and faculty have greatly contributed to the construction and development of the constructivist and realist schools of international relations; a 2004 LSE study ranked the program as 1st among a public institution and 4th overall in the world. A member of the Association of American Universities, Ohio State is a leading producer of Fulbright Scholars, and is the only school in North America that offers an ABET-accredited undergraduate degree in welding engineering. The university's endowment of $6. 8 billion in 2021 is among the largest in the world. Past and present alumni and faculty include 5 Nobel Prize laureates, 9 Rhodes Scholars, 7 Churchill Scholars, 1 Fields Medalist, 7 Pulitzer Prize winners, 64 Goldwater scholars, 6 U. S. Senators, 15 U. S. Representatives, and 108 Olympic medalists. It is classified among "R1: Doctoral Universities – Very high research activity". As of 2021, Ohio State has the most students in the 95th percentile or above on standardized testing of any public university in the United States.