Year	TDS, current US$
1970	59196960.5
1971	67548426.39999999
1972	77585256.7
1973	102858038.5
1974	120350939.29999998
1975	150511184
1976	172062273.5
1977	217527568.4
1978	261407239.39999998
1979	345856619.8999999
1980	441566938.5000002
1981	498523415.00000006
1982	558779786.8
1983	641166465.9
1984	755859507.6
1985	844703310.6999998
1986	1208324045
1987	1368317442.5999994
1988	1614975184.7000003
1989	1382015857.8999999
1990	1925913393.2999995
1991	2668547648.5
1992	2106981173.6999998
1993	2095633688.6
1994	2405551789.6999993
1995	2530922495.8999996
1996	2548722634.3000007
1997	2405562215.5
1998	2389331493.8
1999	2310625286.7
2000	2064166017.5000002
2001	1760126060.1000004
2002	2297072107.3000007
2003	1992292835.3000002
2004	2297297510.8
2005	2176888435.7
2006	2287183355.3
2007	3232031669.7000003
2008	3714832187.7999983
2009	3827585710.3000016
2010	3066184801.9
2011	3510082958.2999997
2012	4259437523.7999997
2013	3732791570.9999995
2014	4226897863.6000004
2015	3978564554.1000004
2016	4031364751.4
2017	4499306081.399999
2018	5375511254.6
2019	6460092631.299999
2020	6540341393.4
2021	9144622286.399998
2022	8383416317.100002