b'2020 2019(x US$1) Staatsolie SPCS GOw2 Total Staatsolie SPCS GOw2 TotalDefined benefit obligation as at January 1(3,496,186) (28,725) (57,688) (3,582,599) (2,987,963) (19,694)-(3,007,657)Interest cost (90,253) (919) (4,863) (96,035) (111,280) (847)-(112,127)Pastservicecost (209,650) (3,047) (4,570) (217,267)- -(55,899) (55,899)Current service cost- -(24,613) (24,613) (172,417) (3,006)-(175,423)Net benefit expense (recognized in P&L) (299,903) (3,966) (34,046) (337,915) (283,697) (3,853) (55,899) (343,449)Benefitspaid 360,348-7,646 367,994 149,218- -149,218Experience different than assumed (106,141) (10,795) (1,091) (118,027) (7,007) 920-(6,087)Changes in assumptions (101,129) (2,993) (9,369) (113,491) (366,737) (6,098) (1,789) (374,624)Sub total included in OCI (207,270) (13,788) (10,460) (231,518) (373,744) (5,178) (1,789) (380,711)Defined benefit obligation as at December 31(3,643,011)(46,479)(94,548)(3,784,038)(3,496,186)(28,725)(57,688)(3,582,599)125'