For Fiscal Year 2011, the Smithsonian's 6,637 volunteers account for 616,047 hours of service to the Institution. Volunteers conduct research, work behind-the-scenes with staff and collections, serve as docents, staff public programs, work as citizen scientists, and assist with seasonal programs such as the Folklife Festival and Summer Camp. More - https://siarchives.si.edu/collections/siris_sic_13434.