Year	TDS, current US$
1970	44711008.1
1971	69121447.1
1972	190050025
1973	301617975.1
1974	711331756.1
1975	469065617.1
1976	787355802
1977	1172273080.8
1978	1689952105.3
1979	3053039955.2
1980	4084077201
1981	4316888296.5
1982	4563465817.3
1983	4723105713.8
1984	5117049503.7
1985	5002362397.6
1986	5166007337.4
1987	5455584443.2
1988	6550599597.2
1989	7007408347.2
1990	8808426817.2
1991	9171694909.8
1992	9332498944.4
1993	9095733965.3
1994	5116621284.6
1995	4250433977.6
1996	4213873700.8
1997	4418022357.9
1998	5131075741.7
1999	5202541287.9
2000	4474204190.8
2001	4377322161.2
2002	4168381241.8
2003	4308466140.2
2004	5743602223.1
2005	5986963317.2
2006	13424781554
2007	1368408996
2008	1245762619.7
2009	1055375357.3
2010	676192756.3
2011	639644376.4
2012	855465143.5
2013	537007590.6
2014	299510345.8
2015	691146085.8
2016	356653844.8
2017	239634904.7
2018	217166621.4
2019	194706478.3
2020	175029512.6
2021	192197332.5
2022	307604585.2