Year	TDS, current US$
1970	168569136.6
1971	235687707.7
1972	323178680.4
1973	549854230.7
1974	741799763.4
1975	1060249155.4
1976	1340025453.9
1977	2057226981.1
1978	2832914115.4
1979	3064723246.7
1980	3084304639.5
1981	3492121798.3
1982	3856153958.1
1983	3741258008.1
1984	4846077885.5
1985	5822706473.8
1986	5983730272.2
1987	7001334729.3
1988	8641924307.1
1989	9832526966.4
1990	9945726981
1991	11474841409.2
1992	12454857565
1993	14086788544.4
1994	14264973040.3
1995	16418529798.5
1996	21545157489.9
1997	19739406183
1998	18312386487.9
1999	17679813828.7
2000	16696848557.3
2001	15541444159
2002	16937730123.9
2003	18546822439.4
2004	20579851041.6
2005	20282630843.6
2006	28320834585.3
2007	23961418044.5
2008	21674256254.9
2009	24897518363.4
2010	31569058232.8
2011	31073407053.8
2012	37240353780.7
2013	41454808849
2014	60119994190.7
2015	60274266103.7
2016	64405727199.7
2017	58809083431.2
2018	55608896086.6
2019	81921259914.6
2020	67616727774.1
2021	73177935224.2
2022	70253114352.6