; non-Federal share (1) Federal share (A) Formula Subject to paragraph (2), the Federal share of a grant under this section shall be based on a formula, determined by the Secretary, that— (i) accounts for the State or Indian tribe’s share of Pell Grant recipients; (ii) provides, for each Pell Grant recipient in the State or Indian tribe, a per-student amount that is at least 75 percent of— (I) for the first award year for which grants are made under this section, the average unmet need of Pell Grant recipients in all States for the most recent year for which data are available; and (II) for each subsequent award year, the amount determined under this subparagraph for the preceding award year, increased by the lesser of— (aa) a percentage equal to the estimated percentage increase in the Consumer Price Index (as determined by the Secretary) since the date of such determination