Read this and answer the question. If the question is unanswerable, say "unanswerable".

The University of the Republic is the country's largest and most important university, with a student body of 81,774, according to the census of 2007. It was founded on 18 July 1849 in Montevideo, where most of its buildings and facilities are still located. Its current Rector is Dr. Rodrigo Arocena. The university houses 14 faculties (departments) and various institutes and schools. Many eminent Uruguayans have graduated from this university, including Carlos Vaz Ferreira, Jose Luis Massera, Gabriel Paternain, Mario Wschebor, Roman Fresnedo Siri, Carlos Ott and Eladio Dieste

In 2007 the University of the Republic had a student body of how many people?
81,774