; (2) calculate and make publicly accessible the cost or savings of the conversion to the Postal Service as well as the average conversion cost or savings to each postal patron and any cost or savings to the State and local government; and (3) place centralized delivery points in locations that maximize delivery efficiency, ease of use for postal patrons, and respect for private property rights. (i) Voucher program The Postal Service shall provide for a voucher program under which, upon application, the Postal Service may defray all or any portion of the costs of new mail receptacles associated with conversion from door delivery under this section which would otherwise be borne by postal patrons. (j) Annual report Not later than 60 days after the end of each of fiscal years 2018 through 2023, the Postal Service shall submit to Congress and the Inspector General a report on the implementation of this section during the most recently completed fiscal year. Each such report shall include— (1) the number of residential and business addresses that— (A) receive door delivery as of the end of the fiscal year preceding the most recently completed fiscal year; (B) receive door delivery as of the end of the most recently completed fiscal year; and (C) during the most recently completed fiscal year, were converted from door delivery to— (i) centralized delivery; (ii) curbside delivery; and (iii) any other primary mode of mail delivery; (2) the estimated cost savings from the conversions described in paragraph (1)(C); (3) a description of the progress made by the Postal Service toward meeting the requirements of the phaseout under subsection (c)