The secretary shall allocate payments to eligible acute care hospitals based on the proportion of each eligible acute care hospital’s total gross patient service revenue to the combined gross patient service revenue of all eligible acute care hospitals in the prior hospital rate year; provided, however, that payments shall be adjusted to allocate proportionally greater payments to eligible acute care hospitals with relative prices falling farthest below the statewide average relative price and shall also consider: (i) Medicaid volume; (ii) commercial volume; (iii) major service categories not readily offered by providers within the same primary service areas and dispersed service areas; (iv) case mix; (v) affiliation status; and (vi) geography. The carriers’ statewide average commercial prices shall be as determined by the health policy commission annually in consultation with the center for health information and analysis and the division of insurance.