The Secretary shall allocate assistance under this part to metropolitan cities, urban counties, and States (for distribution to local governments and private nonprofit organizations in the States) in a manner that ensures that the percentage of the total amount available under this part for any fiscal year that is allocated to any State, metropolitan city, or urban county is equal to the percentage of the total amount available for section 5306 of this title for such prior fiscal year that is allocated to such State, metropolitan city, or urban county.