Every dental plan organization shall, on or before March first in each calendar year, file with the commissioner a report covering its activities for the preceding calendar year. The reports shall be on a form prescribed by the commissioner and shall include: (1) A financial statement of the dental plan organization, including its balance sheet, receipts and disbursements for the preceding year certified by a certified public accountant; (2) any significant modification of information submitted with the application for a certificate of authority; (3) the number of persons who became enrollees during the year, the number of enrollees as of the end of the year and the number of enrollments terminated during the year; (4) a description of the enrollee complaint system including the procedures of the complaint system, the total number of written complaints handled through the system, a summary of causes underlying the complaints filed, and the number, amount and disposition of malpractice claims settled during the year by the dental plan organization and any of the dentists used by it; and (5) any other information relating to the performance of the dental plan organization as required by the commissioner.