at the end of 2015 , the company changed the approach used to measure service and interest costs for its u.s .and material international pension and other postretirement benefits .for 2016 , the company elected to measure service and interest costs by applying the specific spot rates along that yield curve to the plans 2019 liability cash flows .the company believes this approach provides a more precise measurement of service and interest costs by aligning the timing of the plans 2019 liability cash flows to the corresponding spot rates on the yield curve .for 2015 , the company measured service and interest costs utilizing a single weighted-average discount rate derived from the yield curve used to measure the plan obligations .the change in approach did not affect the measurement of the company 2019s plan obligations or the funded status .the company has accounted for this change as a change in accounting estimate and , accordingly , has accounted for it on a prospective basis .the expected long-term rate of return used for the u.s .plans is based on the pension plan 2019s asset mix .the company considers expected long-term real returns on asset categories , expectations for inflation , and estimates of the impact of active management of the assets in coming to the final rate to use .the company also considers actual historical returns .the expected long-term rate of return used for the company 2019s international plans is determined in each local jurisdiction and is based on the assets held in that jurisdiction , the expected rate of returns for the type of assets held and any guaranteed rate of return provided by the investment .the other assumptions used to measure the international pension obligations , including discount rate , vary by country based on specific local requirements and information .as previously noted , the measurement date for these plans is november 30 .the company uses most recently available mortality tables as of the respective u.s .and international measurement dates .for postretirement benefit measurement purposes as of december 31 , 2016 , the annual rates of increase in the per capita cost of covered health care were assumed to be 6.75% ( 6.75 % ) for pre-65 costs and 7.25% ( 7.25 % ) for post-65 costs .the rates are assumed to decrease each year until they reach 5% ( 5 % ) in 2023 and remain at those levels thereafter .health care costs for certain employees which are eligible for subsidy by the company are limited by a cap on the subsidy .during the third quarter of 2016 , the compensation committee of the company 2019s board of directors approved moving the u.s .postretirement healthcare plans to a retiree exchange approach , rather than the employee group waiver plan plus wrap program , for post-65 retiree medical coverage beginning in 2018 , and the company informed all eligible legacy ecolab and legacy nalco retirees of the change .as a result of the approval and communication to the beneficiaries , the ecolab and nalco plans were re-measured , resulting in a $ 50 million reduction of postretirement benefit obligations , with a corresponding impact to aoci of $ 31 million , net of tax .the remeasurement was completed using discount rates of 3.29% ( 3.29 % ) and 3.60% ( 3.60 % ) , respectively .additionally , at the time of this remeasurement , the nalco u.s .postretirement health care plan was merged with the ecolab u.s .postretirement health care plan .as a result of these actions , the company 2019s u.s .postretirement health care costs decreased by $ 5 million in 2016 .assumed health care cost trend rates have an effect on the amounts reported for the company 2019s u.s .postretirement health care benefits plan .a one-percentage point change in the assumed health care cost trend rates would have the following effects: .
[['( millions )', '1-percentage point increase', '1-percentage point decrease'], ['effect on total of service and interest cost components', '$ -', '$ -'], ['effect on postretirement benefit obligation', '0.7', '-0.7 ( 0.7 )']]
plan asset management the company 2019s u.s .investment strategy and policies are designed to maximize the possibility of having sufficient funds to meet the long-term liabilities of the pension fund , while achieving a balance between the goals of asset growth of the plan and keeping risk at a reasonable level .current income is not a key goal of the policy .the asset allocation position reflects the company 2019s ability and willingness to accept relatively more short-term variability in the performance of the pension plan portfolio in exchange for the expectation of better long-term returns , lower pension costs and better funded status in the long run .the pension fund is diversified across a number of asset classes and securities .selected individual portfolios within the asset classes may be undiversified while maintaining the diversified nature of total plan assets .the company has no significant concentration of risk in its u.s .plan assets .assets of funded retirement plans outside the u.s .are managed in each local jurisdiction and asset allocation strategy is set in accordance with local rules , regulations and practice .therefore , no overall target asset allocation is presented .although non-u.s .equity securities are all considered international for the company , some equity securities are considered domestic for the local plan .the funds are invested in a variety of equities , bonds and real estate investments and , in some cases , the assets are managed by insurance companies which may offer a guaranteed rate of return .the company has no significant concentration of risk in its international plan assets .the fair value hierarchy is used to categorize investments measured at fair value in one of three levels in the fair value hierarchy .this categorization is based on the observability of the inputs used in valuing the investments .see note 7 for definitions of these levels. .

Question: for the ecolab and nalco plan remeasurement , what percentage in the reduction of postretirement benefit obligations created a corresponding impact to aoci?
Answer: 62%