As soon as the apportionment of funds has been made pursuant to sections 14-501 and 14-502, the department of finance shall open an account with each such fund authorized to be established by sections 14-501 and 14-502 and shall place a credit to each such fund of ninety percent of the tax levy apportioned to it. Thereafter the department of finance shall credit such funds pro rata with money coming to the city from taxation and other sources which are applicable to current expense purposes until all such credits shall equal one hundred percent of such apportionment. Such pro rata credits in excess of ninety percent shall not apply to the miscellaneous expense fund, but the miscellaneous expense fund shall be credited with all money collected and applicable to current expense purposes after the other funds have received the full one hundred percent of their appropriation.