The first Cost-Of-Living-Adjustment (COLA) became effective on November 1, 1986 and was based on the average weekly wage (AWW) promulgated for October 1, 1986. COLA is based on the change in the AWW from the prior year to the present year. COLA is a 'supplemental benefit' which is equivalent to the difference between the adjusted (COLA) rate and the base rate, or original compensation rate.