b'STAATSOLIE MAATSCHAPPIJ SURINAME N.V.NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 2021 (Continued)Themortalityrateisbasedonpubliclyavailable Thelong-termPIRANYHNo.6FuelOil1.0%mortalitytablesforthespecificcountries.Those Sulphurcrudeoilprices(asperDecember20,mortalitytablestendtochangeonlyatintervalsin 2021)usedintheestimationofthepreliminaryresponse to demographic changes. Future salarycommercialreservesarelistedinthetablebelow.increasesandpensionincreasesarebasedonexpectedfutureinflationratesfortherespective YearUS$/bblcountries.FurtherdetailsaboutpensionobligationsareprovidedinSection4.10. 2022 69.82Hydrocarbon reserve and resource estimates 2023 61.91Hydrocarbonreservesareestimatesoftheamount 2024 58.92ofhydrocarbonsthatcanbeeconomicallyand 2025 52.85legallyextractedfromtheGroupsoilproperties.TheGroupestimatesitscommercialreserves 2026 50.51andresourcesbasedoninformationcompiledbyappropriatelyqualifiedpersonsrelatingtothe 2027 47.85geologicalandtechnicaldataonthesize,depth, 2028 48.64shapeandgradeofthehydrocarbonbodyandsuitableproductiontechniquesandrecovery 2029 49.45rates.Commercialreservesaredeterminedusingestimatesofoilinplace,recoveryfactors 2030 50.33andfuturecommodityprices,thelatterhaving 203151.44 animpactonthetotalamountofrecoverablereservesandtheproportionofthegrossreserves 203252.42 thatareattributabletothehostgovernmentunderthe terms of the production-sharing agreements203353.34 (PSAs).Futuredevelopmentcostsareestimated 2034 54.29usingassumptionsastothenumberofwellsrequiredtoproducethecommercialreserves, 203555.43 the cost of such wells and associated production facilities,andothercapitalcosts. 2036 56.61TheeconomictestsfortheDecember31,2021, 2037 57.88reservevolumeswerebasedonafutureprojection 2038 59.10of crude oil prices using crude oil prices forecasted byPIRAEnergygroupasthereferenceprice. 2039 60.36AveragepriceofactualcrudesalesandthePIRA 2040 61.63pricepremisefor2021(NYHNo6FuelOil1.0%S)arethesamerequiringnoadjustmentfor ThecarryingamountofoilpropertiesatDecemberpricedifferential.Thesameoilpricepremisewas 31,2021isshowninSection4.1.appliedforallreservecategorieslessatransferpremium.A5-yearmovingaverageproduction-receiptratioof0.94%(2020:0.78%)wasappliedtocapturedifferences from crude production and crude receiptatrefinery.AveragepricedifferentialbetweenthePIRAcrudepriceforecastandaveragepostingpriceoftheGroupscrudeoilin2021wasUS$0.14/Bbl(US$69.56/Bbl.versusactualUS$69.70/Bbl.).(2020wasUS$0.71/Bbl:PIRAUS$43.15/Bbl.versusactualUS$43.86/Bbl.)94 STAATSOLIE 2021 ANNUAL REPORT'