The maximum retirement annuity under this subsection (b) shall be 75% of final average salary.
For the purposes of this subsection (b), "final average salary" means the average monthly salary obtained by dividing the total salary of the policeman during the 96 consecutive months of service within the last 120 months of service in which the total salary was the highest by the number of months of service in that period.
Beginning on January 1, 2011, for all purposes under this Code (including without limitation the calculation of benefits and employee contributions), the annual salary based on the plan year of a member or participant to whom this Section applies shall not exceed $106,800; however, that amount shall annually thereafter be increased by the lesser of (i) 3% of that amount, including all previous adjustments, or (ii) one-half the annual unadjusted percentage increase (but not less than zero) in the consumer price index-u for the 12 months ending with the September preceding each November 1, including all previous adjustments.
As used in this subsection (c), "earned annuity" means a Tier 2 monthly retirement annuity determined under subsection (b) of this Section, including any increases the policeman had received pursuant to Section 5-167.1.
For the purposes of this Section, "consumer price index-u" means the index published by the Bureau of Labor Statistics of the United States Department of Labor that measures the average change in prices of goods and services purchased by all urban consumers, United States city average, all items, 1982-84 = 100. The new amount resulting from each annual adjustment shall be determined by the Public Pension Division of the Department of Insurance and made available to the boards of the pension funds.
40 ILCS 5/5-238