Year	TDS, current US$
1970	0
1971	130393.3
1972	2855391
1973	155015.3
1974	6771060.3
1975	6801480
1976	0
1977	820000
1978	1250000
1979	5651906
1980	19160000
1981	17009552.9
1982	10501838.7
1983	8099871
1984	10957415
1985	3716906.4
1986	810106.2
1987	1125139.8
1988	103505.9
1989	3958599.9
1990	146140711.6
1991	8627323.3
1992	5537255.8
1993	8740020.6
1994	25535107.1
1995	26463656.2
1996	25396075.5
1997	26658992
1998	22392255.7
1999	16102355.4
2000	17999936.2
2001	6430414.4
2002	9869971.8
2003	8976268.9
2004	7061146.3
2005	8419262.8
2006	1110369.7
2007	1068482.5
2008	479118.3
2009	599361.5
2010	1849807.8
2011	7455205.6
2012	11393063
2013	11435800.6
2014	11330374.8
2015	9134884.7
2016	3963056.8
2017	65176.7
2018	116114.5
2019	1195156
2020	380307.3
2021	198014.6
2022	4097730.9