Year	TDS, current US$
1970	1687653940.6
1971	818380335.5
1972	919556673.2
1973	1027556295
1974	1178382188.9
1975	1450594517
1976	1892775471.8999999
1977	1985199550
1978	2129031294
1979	2303022781.8
1980	2693896903.9
1981	2896061593.3
1982	3346599208.3
1983	4332187096.2
1984	4724054272.9
1985	5513765672.5
1986	7452038083.1
1987	8098919978.699999
1988	8478839422.4
1989	9399581970.099998
1990	10773654294
1991	10507044798.4
1992	10636820526.3
1993	11321554896
1994	14929625499.3
1995	17653729509.4
1996	16225732744.1
1997	17616527117.100002
1998	15408153630.3
1999	14458242987.2
2000	15233374299.000002
2001	16305501030.3
2002	19877266935.8
2003	30254575485.100002
2004	23394566665.3
2005	27809939708.799995
2006	21613479840.8
2007	44225709889.7
2008	36563249949.100006
2009	22844655772.399998
2010	31637335686.200005
2011	35521628704.1
2012	39682160782.7
2013	50235279342.200005
2014	106683702036.5
2015	59654421358.7
2016	87059453881.4
2017	65084583191.4
2018	81021632501.09999
2019	75391661304.1
2020	96831307197.4
2021	73268700464
2022	91827223357.7