All such persons, firms, associations, or corporations shall, annually before the fifteenth day of February of each year, in accordance with the requirements of a form prepared and furnished by the commissioner of insurance for that purpose and in such detail as the commissioner shall prescribe, file with the commissioner a sworn statement of its business during the year previous, ending with December 31, showing the number of contracts in force, the number of contracts matured and unpaid, the amount of liability in force on said contracts at the end of the year, the business standing and the financial conditions of said persons, firms, associations, or corporations, and such other information as may be required by the commissioner of insurance.