Year	TDS, current US$
1970	4531784.5
1971	7548379.9
1972	9895843.5
1973	18487348.3
1974	16628100.8
1975	21231356.2
1976	28799407.5
1977	61989604.5
1978	90617004.1
1979	147306028.8
1980	209284515.9
1981	303332212.2
1982	290910857.7
1983	364004188.7
1984	408819713.3
1985	516138172.8
1986	593644139.2
1987	761431614.8
1988	1026994861.5
1989	593336798.8
1990	628338794.5
1991	747109310.7
1992	719243556.9
1993	610562220.5
1994	571752813.3
1995	599889585.3
1996	977606369.6
1997	863549825.7
1998	871913729.2
1999	549582242.8
2000	844119721.2
2001	865380938
2002	712285815
2003	1265333505.4
2004	949518547.4
2005	879817895.9
2006	1030916945.1
2007	1123865371
2008	2868264706.8
2009	714389617.3
2010	789515774.7
2011	934353488.6
2012	944735818.1
2013	927084941
2014	1329962933
2015	2100562030.8
2016	2452281089.5
2017	1865893524
2018	2251760399.5
2019	3351203861.4
2020	3107928972.5
2021	3168526336.9
2022	4591495193.9