Year	TDS, current US$
1970	237936284.1
1971	265932375.29999998
1972	308734797
1973	376363846.90000004
1974	466495579.9
1975	503449140.2
1976	440848337.3000001
1977	602137029.7
1978	647822736.3000001
1979	820234811.2
1980	1584367444.3
1981	1688622965.8999999
1982	1493323602.3999999
1983	1329513346.2999997
1984	1666614255.3999999
1985	1907556013.2
1986	2389842780.2
1987	2229847821.9000006
1988	2394241855.4
1989	2389221613
1990	1853730228.3
1991	1486313697.6000001
1992	1085533819.8000002
1993	1078097649.9
1994	1171278248
1995	1263393598.4999998
1996	1469396858.7
1997	1243704953.6
1998	1281597115.3000002
1999	1327966987
2000	1407915458.6999998
2001	1488376807.7999997
2002	2060051757.9
2003	1557468348.6
2004	1855810771.6000006
2005	2041299323.7
2006	2404282066.2000003
2007	3744949979.7999997
2008	4542092288.1
2009	3552778972.600001
2010	2976511295.699999
2011	3639012832.3999996
2012	3049596671.5
2013	4032258450.7
2014	5307998469.4
2015	6101242799.200001
2016	6463982138.800002
2017	6638944093.2
2018	9232930621.300001
2019	9546719227.5
2020	9109767033.9
2021	16172491164.999998
2022	13714761909.300001