Year	TDS, current US$
1970	11726338.9
1971	17433257.8
1972	17625946
1973	40829153.9
1974	39860588.2
1975	42131332.4
1976	44616140.9
1977	58720664.6
1978	113588909.1
1979	147159758.2
1980	259407281.2
1981	182827153.5
1982	123404764.4
1983	116424142.1
1984	161476989.8
1985	189459592.2
1986	299649031.4
1987	387010383.5
1988	388492779.3
1989	381120661
1990	324151057.6
1991	313221225.6
1992	209388335.1
1993	126707375.9
1994	234248207.3
1995	282887160.3
1996	292541016.6
1997	251122216.5
1998	323458197.3
1999	240890359
2000	225683535.1
2001	213257118.6
2002	221526616.8
2003	244332793
2004	341452092.4
2005	203538582.5
2006	186358395.8
2007	190168049.5
2008	181223566.2
2009	197408856.4
2010	186364044.3
2011	346431301.7
2012	394429534.6
2013	504467118.6
2014	361046442.5
2015	1000486472.4
2016	420800398.9
2017	614185198.4
2018	859858443.9
2019	1377879812.6
2020	1015387800.7
2021	2086194102
2022	1943245585.9