Each county shall receive an annual supplement from the State to help defray the expenses of personnel in keeping the registration office open as required in § 7-5-130. Counties with populations from twenty-five thousand to one hundred thousand shall receive twice the amount of such supplement; counties with populations from one hundred thousand one to two hundred thousand shall receive three times the amount of the supplement; counties with over two hundred thousand shall receive four times the amount of the supplement. Such supplements shall be in such amounts as provided for in the annual general appropriations act of the State.