Year	TDS, current US$
1970	475966130.1
1971	529162145.59999996
1972	829229716.2000002
1973	1021259711.1999999
1974	1298046442.6000001
1975	1088082176.5
1976	1442016607.1
1977	2303597536.6
1978	3339129848.1
1979	5141622827.8
1980	8621491529.8
1981	9322782630.4
1982	10254290816.6
1983	10611458169.999998
1984	10741920540.499996
1985	11365783876.4
1986	11997822002.100002
1987	11580750764.2
1988	13918149221
1989	14497112171.799997
1990	16670834385.000002
1991	17423241998.199997
1992	19322303620.100002
1993	18654584929.099995
1994	16577905447.8
1995	18532652840.3
1996	19238416315.2
1997	19036454769.6
1998	15702524673.599998
1999	17474193296.8
2000	16512182325.900002
2001	14283359110.2
2002	15965043392.1
2003	19297617875.4
2004	20832242841.600002
2005	20620663060.9
2006	30533395243.199997
2007	19891389412.399998
2008	21963700363.7
2009	24697556208.200005
2010	24133341092.7
2011	26730451437.300003
2012	24552040380.500004
2013	25620783300.299995
2014	28710434481.7
2015	29060756364.4
2016	34187257302.6
2017	34458188468.3
2018	36958459768.8
2019	41785490551.700005
2020	41683170029.8
2021	44746999418.8
2022	42403811502.1