Year	TDS, current US$
1970	1710000
1971	4413310
1972	3908520
1973	0
1974	1274701.8
1975	610000
1976	1790000
1977	3417084.5
1978	10593972.2
1979	21167847.7
1980	19830000
1981	17680000
1982	13320000
1983	9790000
1984	24020000
1985	52380000
1986	71410000
1987	97788914.8
1988	414023.6
1989	789668.9
1990	86799515.6
1991	69059643.9
1992	279187001.3
1993	16907520.4
1994	7672991
1995	45935882.1
1996	57219203.3
1997	32025743
1998	20309602.2
1999	31555356.9
2000	59814733.2
2001	37702609.7
2002	10296595.2
2003	10817277.7
2004	11844760.2
2005	12143152
2006	12523629.8
2007	12365382.3
2008	5779736.1
2009	710360.1
2010	970889.2
2011	332290
2012	90284.5
2013	390701.9
2014	150443.5
2015	138513.3
2016	230749.7
2017	145607.5
2018	263381.6
2019	2703954.2
2020	3495205.5