El Salvador has research institutes devoted to the study of seismology and geology, meteorology and hydralogy, agriculture (including the Salvadoran Institute for the Study of Coffee), and medicine. The principal learned society in the country is the El Salvador Academy, headquartered in San Salvador. In the same city are museums devoted to natural history and zoology. Nine colleges and universities offer degrees in basic and applied sciences. In 1987–97, science and engineering students accounted for 59% of college and university enrollments. In 1992, research and development expenditures totaled 1.08 billion colones; in 1987–97, 356 technicians and 20 scientists and engineers per million people were engaged in research and development.