Year	TDS, current US$
1970	340100000
1971	140611857.7
1972	207771407
1973	216197680.3
1974	175943902.3
1975	301991182.7
1976	773513627.8000001
1977	806851043.5999999
1978	843129610.9000001
1979	856417116.5999999
1980	1094907701.3999999
1981	1007436279.4999999
1982	1123439552.7000003
1983	1449365862.1
1984	1963242090.7000003
1985	2355926985.6
1986	3723425603.8000007
1987	4181391511.2
1988	3865670195.2
1989	3331359828.8999996
1990	3178189542.6999993
1991	2644987971.8000007
1992	2365876888.2
1993	2154732374.9999995
1994	2791865937.5
1995	5984116307.199999
1996	2960381624.399999
1997	2712632549.399999
1998	2370258458.9999995
1999	2845826170.6
2000	2670980283.2999997
2001	1953089676.5
2002	2211796532.0999994
2003	2854494695.1
2004	3075235278.9999995
2005	2751873115.7999997
2006	2045586683.6
2007	1174529081.6
2008	971403316.6999998
2009	1027036723.4999999
2010	990437541.8000002
2011	1237632339.1
2012	6773648746.9
2013	10674369853.400002
2014	7418025614.200001
2015	3482696195.9999995
2016	1876531773.7000003
2017	3168717031.8000007
2018	4899052071.600001
2019	4958107890.900001
2020	4236505962
2021	6702665784.300003
2022	7657990658.499997