; (2) in subparagraph (E), by striking the period; and (3) by adding at the end the following: (F) $850,000,000 for fiscal year 2018; (G) $893,000,000 for fiscal year 2019; (H) $938,000,000 for fiscal year 2020; (I) $985,000,000 for fiscal year 2021; (J) $1,030,000,000 for fiscal year 2022; (K) $1,090,000,000 for fiscal year 2023; (L) $1,100,000,000 for fiscal year 2024; (M) $1,200,000,000 for fiscal year 2025; (N) $1,300,000,000 for fiscal year 2026; (O) $1,500,000,000 for fiscal year 2027; and (P) for fiscal year 2028, and each subsequent fiscal year, the amount appropriated for the preceding fiscal year adjusted by the product of— (i) one plus the average percentage increase in the costs of health professions education during the prior fiscal year; and (ii) one plus the average percentage change in the number of individuals residing in health professions shortage areas designated under section 333 of the Public Health Service Act during the prior fiscal year, relative to the number of individuals residing in such areas during the previous fiscal year. . (b) Limitation Amounts otherwise appropriated for National Health Service Corps may not be reduced as a result of the appropriations made under this section. (c) Availability of funds Amounts appropriated under this section shall remain available until expended. 4. Teaching Health Centers (a) In general Section 340H(g) of the Public Health Service Act ( 42 U.S.C. 256h(g) ) is amended— (1) by striking 2015 and and inserting 2015,