If a corporation utilizes a group’s loss ratio as a rating factor at the time of renewal of a policy, plan, or contract, the corporation shall, upon request of an insured or subscriber, provide the loss ratio and the components of the loss ratio calculation to the insured or subscriber no more than 90 days but no less than 60 days before the renewal date of the policy, plan, or contract. For purposes of this section, “loss ratio” means the total losses paid out in medical claims divided by the total earned premiums: Provided, That that the requirements of this section do not apply to a dental service corporation as that term is defined in this article.