; and (ii) for a subsequent year, shall be the dollar amount specified in this subparagraph (or subparagraph (A)) for the previous year, increased by the percentage increase in the consumer price index for all urban consumers (United States city average) as of January of the previous year. Any dollar amount specified under this subparagraph that is not a multiple of $10 shall be rounded to the nearest multiple of $10. (2) Unit defined The term unit means, with respect to a part D rebatable drug, the lowest identifiable quantity (such as a capsule or tablet, milligram of molecules, or grams) of the part D rebatable drug that is dispensed to individuals enrolled under a prescription drug plan under this part or an MA–PD plan under part C. (3) Payment amount benchmark year The term payment amount benchmark year means the year beginning January 1, 2016. (4) Benchmark period CPI–U The term benchmark period CPI–U means the consumer price index for all urban consumers (United States city average) for January 2016. (5) Rebate period CPI–U The term rebate period CPI–U means, with respect to an applicable year, the consumer price index for all urban consumers (United States city average) for January of such year. (6) Average manufacturer price The term average manufacturer price has the meaning, with respect to a part D rebatable drug of a manufacturer for an applicable year, given such term in section 1927(k)(1), with respect to a covered outpatient drug of a manufacturer for a rebate period under section 1927. For purposes of applying the previous sentence, with respect to a part D rebatable drug of a manufacturer and an applicable year, the Secretary shall use the information with respect to the average manufacturer price for such drug reported by the manufacturer under section 1927(b)(3) with respect to each of the quarters in the applicable year and calculate an annual average manufacturer price for such applicable year as the average of such average manufacturer prices for each such quarter, weighted by units of such