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City of Orono, Minnesota Notes to the Financial Statements December 31, 2021 Note 4: Defined Benefit Pension Plans - Statewide (Continued) E. Actuarial Assumptions The total pension liability in the June 30, 2021, actuarial valuation was determined using an individual entry-age normal actuarial cost method. The long-term rate of return on pension plan investments used in the determination of the total liability is 6.5 percent. This assumption is based on a review of inflation and investments return assumptions from a number of national investment consulting firms. The review provided a range of return investment return rates deemed to be reasonable by the actuary. An investment return of 6.5 percent was deemed to be within that range of reasonableness for financial reporting purposes. Salary growth assumptions in the General Employees Plan range in annual increments from 10.25 percent after one year of service to 3.0 percent after 29 years of service and 6.0 percent per year thereafter. In the Police and Fire Plan, salary growth assumptions range from 11.75 percent after one year of service to 3.0 percent after 24 years of se rvice. Mortality rates for the General Employees Plan are based on the Pub -2010 General Employee Mortality Table. Mortality rates for the Police and Fire Plan is based on the Pub-2010 Public Safety Employee Mortality tables. The tables are adjusted slightly to fit PERA’s experience. Actuarial assumptions used in the June 30, 2021 valuation were based on the results of actuarial experience studies. The most recent four-year experience study in the General Employees Plan was completed in 2019. The assumption changes were adopted by the Board and become effective with the July 1, 2020 actuarial valuation. The most recent four -year experience study for the Police and Fire Plan was completed in 2020 were adopted by the Board and became effective with the July 1, 2021 actuarial valuation. The following changes in actuarial assumptions and plan provisions occurred in 2021: General Employees Fund Changes in Actuarial Assumptions • The investment return and single discount rates were changed from 7.50 percent to 6.50 percent, for financial reporting purposes. • The mortality improvement scale was changed from Scale MP-2019 to Scale MP-2020. Changes in Plan Provisions • There were no changes in plan provisions since the previous valuation. DRAFT 75