Each savings bank shall maintain an adequate net worth appropriate for the conduct of its business and the protection of its savings account holders. The net worth adequacy of a savings bank shall be determined by the commissioner on a regular basis, but not less than one (1) time per year after evaluating the character of management, the quality of assets, history of earnings and the retention thereof, the potential volatility of the deposit structure and the institution's capacity to furnish the broadest service to the public. A written report of such finding and determination shall be made and filed by the commissioner.