Year	TDS, current US$
1970	1664000
1971	1876000
1972	1184000
1973	1248000
1974	7990697.3
1975	6155946
1976	8492355.4
1977	9784986.8
1978	13332867.3
1979	24844378.5
1980	23649330.1
1981	20244536.2
1982	20009339.9
1983	28779723
1984	27663886.4
1985	29995093
1986	37812544
1987	60225786
1988	71568772.9
1989	64760076.2
1990	68104650.9
1991	70010612.6
1992	49109423.1
1993	11814738.1
1994	854941.4
1996	117594.6
1999	0
2000	0
2001	0
2002	412005212
2003	93945230.5
2004	59160035.7
2005	63511572.2
2006	81496999.5
2007	152811953.1
2008	183648173.4
2009	192661390.7
2010	175888166.3
2011	236014368.6
2012	209292082.9
2013	208095868.9
2014	244243746.9
2015	173720599.3
2016	237203255.7
2017	179904111
2018	165429082.2
2019	892387907.3
2020	154653999.2
2021	206384390.6
2022	194920385.1