; and (2) by adding at the end the following: (4) For the purpose of carrying out paragraph (1), for fiscal year 2017 and each fiscal year thereafter, the Office shall use— (A) demographic factors specific to current and former employees of the United States Postal Service, unless such data cannot be generated; and (B) economic assumptions regarding wage and salary growth that reflect the specific past, and likely future, pay for current employees of the United States Postal Service. . (b) Federal Employees Retirement System liability assumption reform Section 8423 of title 5, United States Code, is amended— (1) in subsection (a)— (A) in paragraph (1)— (i) in subparagraph (A)— (I) in clause (i), by striking subparagraph (B)), and inserting subparagraph (B) or (C)), ; and (II) in clause (ii), by striking and at the end; (ii) in subparagraph (B)(ii), by striking the period at the end and inserting ; and ; and (iii) by adding at the end the following: (C) the product of— (i) the normal-cost percentage, as determined for employees (other than employees covered by subparagraph (B)) of the United States Postal Service under paragraph (5), multiplied by (ii) the aggregate amount of basic pay payable by the United States Postal Service, for the period involved, to employees of the United States Postal Service. ; and (B) by adding at the end the following: (5) (A) In determining the normal-cost percentage for employees of the United States Postal Service for purposes of paragraph (1)(C), the Office shall use— (i) demographic factors specific to such employees, unless such data cannot be generated