entering class of 2011. Undergraduate and graduate admission to Colmex is very selective. El Colegio de México received 936 applications for admission to the Class of 2014 and 181 were admitted (18.1%). 87% of students graduate within 4 years. Research Centers In the 2010–2011 school year, El Colegio de México offered 19 academic programs in seven academic centers, of which 16 are doctoral and master's graduate degree programs. Despite strong increases in university enrollment across Mexico, El Colegio de México has upheld a student-faculty ratio of 2.5:1. There are nearly 181 tenured or tenure-track professors and 50 adjunct and visiting professors teaching at the college. 21% of all students are enrolled in the Centre for International Studies, Colmex's largest academic unit. Of the other larger centers, the Centre for Demographic, Urban and Environmental Studies enrolls 19%, the Centre for Historical Studies enrolls 15%, the Centre for Linguistic and Literary Studies enrolls 13%, the Centre for Economic Studies and the Centre for Sociological Studies enroll about 10% each. The remainder of all students are enrolled in Colmex's smaller schools, including the Centre of Asian and African Studies, founded by Flora Botton; the Gender Studies Program, founded by , Botton, and Elena Urrutia; and the Daniel Cosío Villegas Library, which is also one of the richest libraries in North America, with sources in many languages. Since 1991, El Colegio de México is the host institution of LEAD-Mexico (Leadership for Environment and Development), a program established by The Rockefeller Foundation to bring together and train mid-career leaders from all parts of the world in improving their leadership skills around the issues of sustainable development . Led primarily by renowned Colmex professor Boris Graizbord, Lead Mexico responds to calls for acting as consultant, advisor, and policy evaluator at federal and local level. Exchange and cooperation arrangements (2021) Canada Glendon College Queen's University Université du Québec à Montréal University of British Columbia Université de Montréal United States Yale University Tulane University American University Johns Hopkins University State University of New York University of Chicago The University of Texas at San Antonio Korea Dongguk University Hankuk University of Foreign Studies Seoul National University Busan University of Foreign Studies India University of Delhi Jadavpur University Jawaharlal Nehru University Israel Hebrew University of Jerusalem Japan Ritsumeikan University Hitotsubashi University Tsukuba University Keio University Waseda University Institute of Developing Economies Kyoto University of Foreign Studies Tokio University Germany Humboldt