Year	constant 2015 US$
1970	32070303100.295223
1971	36101747226.25558
1972	37147689385.54405
1973	34320692314.965477
1974	30001098972.33469
1975	23471868628.44664
1976	25252075033.425373
1977	28533643721.875988
1978	30620022363.823082
1979	33402638938.3741
1980	35400515213.626915
1981	37605041256.56459
1982	41212838475.96
1983	29745955386.37039
1984	28492596225.502434
1985	27970853684.112564
1986	30570756674.155148
1987	34117809492.038635
1988	37624670363.39056
1989	40835645852.942
1990	42822636104.60294
1991	48429739322.92609
1992	54943773612.64718
1993	58938870227.63339
1994	63607341230.54566
1995	72667653614.81845
1996	77713773782.63608
1997	83915618763.61609
1998	88913022628.70456
1999	87958732343.41644
2000	91232552203.36441
2001	94828541209.94362
2002	97893226920.79878
2003	102175394168.19293
2004	108368518077.1369
2005	117976254057.89253
2006	122956238469.74074
2007	133135966460.96747
2008	135408598639.08527
2009	141138189084.03543
2010	156993704871.91766
2011	161668537285.76297
2012	179180870723.5256
2013	187661619440.70074
2014	190644852387.8572
2015	201607398550.396
2016	201043728204.00443
2017	203102168895.13943
2018	205061072770.5183
2019	211022493040.36005
2020	191271357912.5661
2021	203183588130.13187