In addition to the foregoing amount an additional cost-of-living adjustment is provided effective October 1, 1989 as follows:
(1) One dollar per month for each year of service attained by said retiree for each retiree selecting the maximum retirement allowance or Option 1.
(2) One dollar per month for each year of service attained by said retiree reduced by the retiree's option election factor for each retiree selecting Options 2, 3 or 4.
(3) One dollar per month for each year of service attained by said deceased member or deceased retiree reduced by the survivor's option factor for each beneficiary receiving monthly benefits from the Teachers' Retirement System.