The principal scientific policymaking body in Costa Rica is the General Directorate of Geology, Mining, and Petroleum (founded in 1951). Several institutes specialize in tropical sciences, including the Organization for Tropical Studies in San Pedro, the Tropical Science Center in San José, and the Tropical Agronomy Center in Turrialba, as well as medicine, nuclear energy, technology, geology, agriculture, and meteorology. The University of Costa Rica in San José, founded in 1843, has faculties of agronomy, science, pharmacy, engineering, medicine, microbiology, and dentistry. The National University in Heredia, founded in 1973, has faculties of exact and natural science, earth and sea sciences, and health sciences. The Technological Institute of Costa Rica in Cartago, founded in 1971, has numerous attached research centers. In 1987–97, science and engineering students accounted for 20% of college and university enrollments. In the same period, there were 532 scientists per million people engaged in research and development.