b'STAATSOLIE MAATSCHAPPIJ SURINAME N.V.NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 2019 (Continued)Retiree medical plan Staatsolie2019changesinthedefinedbenefitobligationandfairvalueoftheplanassets.Pension cost charged to profit or loss Remeasurement gains/(losses) in other comprehensive income(X US$ 1,000) Return on Actuarial plan assets changes Net InterestSub-totalBenefits(excludingarising fromExperienceChange in Sub total Contribution 1.1.2019 Service cost expense included inpaid amountschanges inadjustments exchange rate included inby employer 31.12.2019profit or loss included infinancial OCInet interestassumptionsexpense)Definedbenefitobligation(22,288) (1,283) (1,663)(2,946) 161-568(231) 139476 - (24,597)Fairvalueofplanassets7,208 -545545(161)(412)- - - (412)240 7,420 Benefit liability(15,080)(1,283)(1,118)(2,401)- (412)568 (231)139 64 240 (17,177)2018changesinthedefinedbenefitobligationandfairvalueoftheplanassets.Pension cost charged to profit or loss Remeasurement gains/(losses) in other comprehensive income(X US$ 1,000) Return on Actuarial plan assets changes Net InterestSub-totalBenefits(excludingarising fromExperienceChange in Sub total Contribution 1.1.2018 Service cost expense included inpaid amountschanges inadjustments exchange rate included inby employer 31.12.2018profit or loss included infinancial OCInet interestassumptionsexpense)Definedbenefitobligation(20,206) (1,189) (2,526)(3,715) 161-600 976(104)1,472 - (22,288)Fairvalueofplanassets6,700 -844844(136)(443)- - - (443)243 7,208 Benefit liability(13,506)(1,189)(1,682)(2,871)25 (443)600 976 (104)1,029 243 (15,080)TheplanassetvalueoftheStaatsolieretireemedicalplanisprovidedbytheinsurancecompanywheretheplanassetsareincorporatedinanannuityinsurancepolicy.Thefairvalueofplanassetsisthesumofthesurrendervalueandtheestimatedexcessinterest,asshownbelow:(X US$ 1,000) 2019 2018Surrendervalue 7,368 7,158Excess interest 52 50Fairvalueofassets 7,4207,208 102 STAATSOLIE 2019 ANNUAL REPORT'