Each industrial loan company shall pay to the commissioner its pro rata share of all costs and expenses of the department in administering this division and other laws relating to industrial loan companies or the industrial loan business, as estimated by the commissioner for the ensuing year and of any deficit actually incurred or anticipated in the year in which the assessment is made. The pro rata share shall be the proportion which a company’s assets bear to the aggregate assets of all companies as shown by the latest annual reports of the companies to
the commissioner. The pro rata share shall not include the costs of any examinations provided for in Section 18392, unless they cannot be collected from the company examined.