Year	TDS, current US$
1970	37748035.3
1971	46000519.3
1972	50751542.8
1973	70590884.3
1974	71774405.6
1975	103322805.3
1976	98434386.8
1977	152439840.4
1978	107952815.1
1979	109632735.7
1980	101207332.8
1981	98267384.9
1982	134544044.6
1983	207926322.4
1984	245569519.5
1985	268254331.5
1986	294342895.2
1987	268777560.3
1988	209912302.4
1989	174525919
1990	217195591.8
1991	254820564.8
1992	243081765.2
1993	303986867.4
1994	349600328.2
1995	289794086.9
1996	319476661.8
1997	283833223.4
1998	456134620.7
1999	342173148.3
2000	377584131.8
2001	386432734.8
2002	505942719.7
2003	716749137
2004	909380046.6
2005	877125712.4
2006	1266669790.9
2007	1117868647.6
2008	1009185495.4
2009	1179178241.4
2010	1113222783.4
2011	1316615408.3
2012	1185443813.1
2013	1151712122
2014	1296981020.2
2015	1307751584.1
2016	1405372331.2
2017	3813925599.4
2018	3546718990.1
2019	5623798968
2020	5158288639.4
2021	5797390002.9
2022	3345865267.1