Year	TDS, current US$
1970	7147000
1971	6806000
1972	6525000
1973	6160000
1974	6108000
1975	1343814.4
1976	4350381.6
1977	26207260.3
1978	105457421.6
1979	30367702.4
1980	57501776.7
1981	72575856.5
1982	86983320.3
1983	115491178.2
1984	145395819.2
1985	187889656
1986	260183572
1987	309076933.3
1988	364514297.7
1989	341214139.2
1990	465243343.6
1991	598952165.5
1992	505851894.1
1993	477251284.3
1994	492934021.6
1995	542097042.9
1996	517416225.7
1997	554208706.4
1998	488659875.5
1999	483214649.5
2000	446945556.2
2001	432353535.6
2002	507516732.5
2003	681641937.9
2004	500233266.4
2005	568114304.2
2006	552383186
2007	854786462.5
2008	868205640.2
2009	863175096.8
2010	848810555.4
2011	840711719.4
2012	817024915.5
2013	1019074814.9
2014	1038885445.2
2015	1048530521.8
2016	1097044508.1
2017	1555238211.7
2018	3165293052.6
2019	2948313045.7
2020	2043911748.7
2021	3405060970.6
2022	4302237647.4