field was re-located at Cole Field. The Renzi Lamb Field for lacrosse and field hockey, built with artificial turf, was added to Weston Field in 2004. In November 2013 Williams College began its $22 million renovation of the Weston Field complex. This upgrade includes an artificial turf football field, relocation of the Plansky Track and Lamb Field, new bleachers, improved lighting and the addition of support buildings for the athletes. The completed facility, which reopened in September 2014, allows year round athletic events and practice. People Student body Williams enrolled 2,121 undergraduate students and 50 graduate students in 2021. Women constituted 51.6% of undergraduate students and 56.0% percent of graduate students. 48% of students received need-based financial aid averaging $63,516 in 2021, and 20% qualified to receive Pell Grants. The median family income of Williams students is $185,800, the third-highest in Massachusetts, with 55% of students coming from the top 10% highest-earning families and 20% from the bottom 60%. Williams has a 97% freshman retention rate and an 86% four-year graduation rate. 90% of first-years enrolled in the Class of 2021 graduated in the top tenth of their high school graduating class, and their inter-quartile range on the new SAT was 720–770 on Evidence-Based Reading and Writing, and 740–790 on Math. The inter-quartile range on the ACT was 33–35. Faculty Notable former and present faculty include: Colin Adams, mathematics professor and knot theorist, 2003 recipient of the Robert Foster Cherry Award for Great Teachers Andrea Barrett, National Book Award winning author and MacArthur Fellow Gene H. Bell-Villada, fiction writer, critic of Latin American literature, and historian of aesthetics Olga Beaver, professor of mathematics Robert Huntley Bell, professor of English Edward Burger, mathematics professor, 2010 recipient of the prestigious Robert Foster Cherry Award for Great Teaching James MacGregor Burns, professor of political science, founder of the modern field of leadership studies Franklin Carter, professor of Germanic and Romance languages Raymond Chang, who has written high school and college textbooks in chemistry. Rónadh Cox, the Brust Professor of Geology and Mineralogy Andrea Danyluk, professor of computer science Emile Despres, professor of economics, a former advisor on German economic affairs at the U.S. Department of State Satyan Devadoss, award-winning mathematician and current Fletcher Jones Chair of Applied Mathematics and professor of computer science at the University of San Diego Charles B. Dew, author and Ephraim Williams Professor of American History S. Lane Faison,