Year	TDS, current US$
1970	177210196.7
1971	194241801.6
1972	322074548
1973	224220305.3
1974	257578394.7
1975	376624021.3
1976	590460774.4
1977	953720173.7
1978	1351520397.7
1979	1340572400.7
1980	1607252991.9
1981	2399350716.1
1982	2968418606.3
1983	3138469297
1984	3223509475.2
1985	4601397092.4
1986	4472790984.6
1987	5981151264.4
1988	7526603174
1989	7092056455
1990	7421580250.4
1991	8288469662
1992	9085597051.9
1993	8602392518
1994	10258128397.1
1995	11451206440.5
1996	10911756876
1997	11912950897
1998	14943935742
1999	18607276014.4
2000	20690300521.5
2001	22336706298.8
2002	27840788826.4
2003	28302110919.3
2004	32692651102.5
2005	41473179435.8
2006	41305486916.3
2007	49652020622.4
2008	56081961460
2009	63118923949.1
2010	59934133542.8
2011	58593239296.9
2012	57674403866.5
2013	64423740214.3
2014	58706210581.6
2015	55813675671.4
2016	75706394626
2017	86678240000.1
2018	83348261258.7
2019	85899080017.9
2020	86159501658.5
2021	72682435006.4
2022	69337657206.4