On or before May first, annually, the assessor or board of assessors of each municipality shall certify to the Secretary of the Office of Policy and Management, on a form or forms provided by the secretary, the amount of exemptions approved under the provisions of subdivisions (60), (70), (72) and (76) of § 12-81 for the most recently completed assessment year, together with such supporting information as the secretary may require, including the number of taxpayers with approved claims under each said subdivision and a copy of the applications filed by such taxpayers for each said subdivision.