Conn. Gen. Stat. § 38a-351a

Except as prohibited by section 38a-336b , if an insurer chooses to exercise its right of subrogation pursuant to the terms of an automobile liability insurance policy, such insurer shall include in such subrogation demand the amount of any collision deductible paid by such insured, unless such insured requests such insurer not to include such amount. The insurer shall share subrogation recoveries with the insured on a proportionate basis.