The Office of General Services shall prepare statistical data concerning the procurement, use, and disposition of all supplies, services, and construction. All using agencies shall furnish such reports as the Office of General Services may require concerning use, needs, and stocks on hand, and the chief procurement officers shall prescribe forms to be used by the using agencies in requisitioning, ordering, and reporting supplies, services, and construction. The chief procurement officers shall limit requests for information to those items necessary for the effective operation of the purchasing system, but using agencies shall be required to provide information as requested.