; by (II) the national average wage index (as so defined) for 2025. (iv) The amount established under this subparagraph for any calendar year shall be rounded to the nearest $1, except that any amount so established which is a multiple of $0.50 but not of $1 shall be rounded to the next higher $1. (C) (i) Except as provided in clause (ii), in the case of any calendar year after 2026, each of the percentages to which this subparagraph applies by reason of clauses (iii) or (iv) of subparagraph (A) shall be a percentage equal to such percentage multiplied by the quotient obtained by dividing— (I) the difference of the maximum CPI-indexed benefit amount for such year over the amount determined under this paragraph for an individual whose average indexed monthly earnings are equal to the amount established for purposes of subparagraph (A)(ii) for such year