All members of the association shall participate in its writings, expenses, profits, and losses in the proportion that the net direct premium of such member written in this state during the preceding calendar year bears to the aggregate net direct premiums written in this state by all members of the association, as certified to the association by the commissioner after review of annual statements, other reports, and any other statistics the commissioner shall deem necessary to provide the information herein required and which the commissioner is hereby authorized and empowered to obtain from any member of the association.
A member shall receive credit annually for essential property insurance voluntarily written in rural and coastal areas, and its participation in the writings of the association shall be reduced in accordance with the provisions of the plan of operation.
The participation of each member in the association shall be determined annually.