Over three quarters of the student body has some proficiency in a second language (numbering 107 languages in total). This is partially due to the fact that 45 percent of the student body at BYU has been missionaries for LDS Church, and many of them learned a foreign language as part of their mission assignment. During any given semester, about one-third of the student body is enrolled in foreign language classes, a rate nearly four times the national average. BYU offers courses in over 60 different languages, many with advanced courses that are seldom offered elsewhere. Several of its language programs are the largest of their kind in the nation, the Russian program being one example. The university was selected by the United States Department of Education as the location of the national Middle East Language Resource Center, making the school a hub for experts on that region. It was also selected as a Center for International Business Education Research, a function of which is to train business employees in international languages and relations.