Each dollar amount expressed as a fixed dollar amount in the table set forth in paragraph (1), and the amounts specified under paragraphs (1) and (2) of subsection (e), shall be annually indexed to the amount by which retired pay is increased under
section 1401a of this title, rounded to the next lower multiple of $1. The remaining amount above such multiple of $1 shall be carried over to, and accumulated with, the amount of the increase for the subsequent year or years and made when the aggregate amount of increases carried over under this clause for a year is $1 or more.