Year	TDS, current US$
1970	2998837407.0000005
1971	2304935477.4000006
1972	2857263996.7
1973	3932845173.9
1974	4082898988.7999997
1975	4392017268.4
1976	5736572831.599999
1977	6921469188.599999
1978	9370209568.000002
1979	12264374978.400002
1980	19074100508.899998
1981	21872451637.9
1982	24308623854.600002
1983	25618999839.600006
1984	27373638542.399998
1985	29177409660.199997
1986	30430310285.20001
1987	30441461077.000008
1988	34320507818.3
1989	35279308723.49999
1990	41251410834.3
1991	41425044460.29999
1992	43061707628.9
1993	43314518751.40001
1994	46313108050.800026
1995	55049209156.89999
1996	53438699538.899994
1997	53356179031.600006
1998	49337717164.99999
1999	51701444965.7
2000	54293735468.499985
2001	53909045479.1
2002	59070136294.1
2003	73697901953
2004	70371346122.79999
2005	82322612228.70003
2006	92253627386.49995
2007	97965737395.40002
2008	97943748717.79997
2009	92489042392.60002
2010	108016162536.5
2011	116889301858.09999
2012	124460428251.2
2013	147964965731.90002
2014	200356303660.29993
2015	161239037518.90002
2016	190605876265.99997
2017	180687883921.59998
2018	210858933703.99994
2019	225417423237.09998
2020	223774205418.70004
2021	218362249073.39993
2022	244957280101.69998