Year	TDS, current US$
1970	10800
1971	15215.7
1972	40025.7
1973	483172.7
1974	433044.3
1975	443591.8
1976	356698.7
1977	406719.3
1978	440246.3
1979	798895.8
1980	3644268.5
1981	3925208
1982	6438698.7
1983	8264906.5
1984	8659180.3
1985	17559169.8
1986	15892263.5
1987	15784870.7
1988	16731972.9
1989	17331537.7
1990	18282299.8
1991	16379511.1
1992	16154243.5
1993	18094735.5
1994	24833387.2
1995	36609275
1996	40283057.9
1997	39688552.9
1998	45962970.7
1999	46939818.2
2000	77198137.4
2001	96965308.1
2002	188649532
2003	153189839.4
2004	329311316.7
2005	229122170.9
2006	138243976
2007	650041618.9
2008	147402942
2009	125508607.8
2010	127141264.5
2011	131307977.4
2012	154718507.9
2013	135416858.8
2014	92091582.2
2015	97912772
2016	102376014.2
2017	104442717.6
2018	113766027
2019	104195374.1
2020	79592105.7
2021	618311418.7
2022	76636707.2