Year	TDS, current US$
1970	0
1971	30090.8
1972	32571
1973	35772.8
1974	36080.3
1975	36436.5
1976	0
1977	0
1978	0
1979	0
1980	1030000
1981	800000
1982	2994000
1983	8528000
1984	1966000
1987	1757785.2
1988	3888864.6
1989	9006840.2
1990	27101259.6
1991	36422523.1
1992	44947416.9
1993	41590154.1
1994	26394344.6
1995	56673371.8
1996	9870686.5
1997	9269342.4
1998	28503181.5
1999	29275802.9
2000	14737967.5
2001	15518016.4
2002	15640155.7
2003	15687861.9
2004	26910116.4
2005	28353205.2
2006	18607953.3
2007	37397337
2008	25610748.1
2009	538279.2
2010	723047.4
2011	247465.2
2012	67419.5
2013	289861.8
2014	110933.1
2015	103535.2
2016	172367.3
2017	679501.8
2018	4231098
2019	9821004.8
2020	10448003.7
2021	23895666.1
2022	62319768.4