Year	TDS, current US$
1970	1900000
1971	50151.3
1972	54285
1973	59621.3
1974	60133.8
1975	1044513
1977	607139
1980	3750825.4
1981	433877.3
1982	8659293.8
1983	6943520.8
1984	12608707.5
1985	14452841.6
1986	54972688.8
1987	29024412.2
1988	918110.8
1989	14592209.3
1990	3593679.7
1992	245098.6
1993	333737.8
1994	41529.8
1995	726756.8
1996	572003.3
1997	42658.8
1998	187235.3
1999	1703366.6
2000	809143.4
2001	550540
2002	524000.5
2003	300802
2004	450640.6
2005	721702.9
2006	857783
2007	740248.2
2008	1829627.8
2009	167530.7
2010	228973.7
2011	78367
2012	220472.9
2013	585698.1
2014	34951.5
2015	32179.9
2016	54212.3
2017	34668.5
2018	62305.3
2019	638337.7
2020	340044907.2
2021	755019.8
2022	4180702.5