; (II) nonprofit institutions; that provide community development or assistance services; (III) community anchor institutions, such as— (aa) public libraries; (bb) elementary schools and secondary schools (as defined in section 8101 of the Elementary and Secondary Education Act of 1965 ( 20 U.S.C. 7801 )); (cc) institutions of higher education; and (dd) health care facilities; (IV) private entities; and (V) philanthropic organizations. (4) Grant amounts (A) Maximum Except as provided in subparagraph (B), the amount of any grant made under this section shall not exceed 75 percent of the total project cost. (B) Secretarial authority to adjust (i) In general The Secretary may make grants of 100 percent of the development costs of the project for which the grant is provided to an eligible entity if the Secretary determines that the project serves an area of rural households where the population density is fewer than 7 households per square mile. (ii) Definition of development costs In this paragraph, the term development costs means costs of— (I) construction, including labor and materials; (II) project applications; and (III) other development activities, as determined by the Secretary. (iii) Density determinations In determining population density under this section, the Secretary shall prescribe a calculation method which— (I) utilizes publicly available data