Year	TDS, current US$
1970	150000
1971	3761343.8
1973	6510640.5
1974	16295443.8
1975	16452787.5
1976	2190000
1977	4670000
1978	16653422.3
1979	34128627.1
1980	42030000
1981	86110000
1982	95090000
1983	95730000
1984	120810000
1985	117250000
1986	173720000
1987	287793439.2
1988	260859070.5
1989	204740886.1
1990	145384504.8
1991	119122480
1992	107681384
1993	96645720.9
1994	104580662.9
1995	112102608.8
1996	81074934.9
1997	41124450.3
1998	22267432.2
1999	25014434.3
2000	25254466.7
2001	22150116.2
2002	20850525.3
2003	17305427.8
2004	9488746
2005	2634884.9
2006	2486696.6
2007	2194911.3
2008	512950.9
2009	943405.1
2010	7731892.1
2011	12533541.8
2012	9478986.4
2013	276263313.5
2014	414172612.6
2015	140290226.5
2016	13123542.5
2017	27192554.5
2018	67240189.9
2019	107159210.7
2020	129113643.4
2021	144486582.7
2022	149061317