Year	TDS, current US$
1970	39469185.8
1971	34803068.3
1972	43045628.2
1973	82455793.9
1974	61306793.1
1975	69423220
1976	89805085.4
1977	114251972.7
1978	112308980.9
1979	66199913.1
1980	121814016.4
1981	231408992.5
1982	208711761.3
1983	111288663.6
1984	90020833
1985	75135503.2
1986	44119336.9
1987	73628455.9
1988	36657000
1989	19041000
1990	20219000
1991	545866366.7
1992	113257247.1
1993	136901650.9
1994	209843514.4
1995	290133929.6
1996	220734265
1997	328509595.9
1998	256426254.2
1999	189480699.4
2000	289430552.6
2001	339821962.5
2002	157183949
2003	194063088.5
2004	132074990.5
2005	174066865.5
2006	168062046.4
2007	400521300.3
2008	429941954.3
2009	468554970
2010	574326392.3
2011	730180025
2012	2140829782.2
2013	2266923676
2014	2955058736.8
2015	1571140237.8
2016	1866217321.8
2017	2638990879.5
2018	2175722184.8
2019	1776830614.5
2020	1791363933.6
2021	1838365487.4
2022	2407895523.7