Year	TDS, current US$
1970	528420396.7
1971	547465246.1
1972	580319304.4
1973	836780935.9
1974	847557675
1975	860628287.9
1976	878382532
1977	1149047421.5
1978	1216226210.8
1979	1417467649.9
1980	2165835110.3
1981	2508588234.1
1982	2049732461.3
1983	1321394984.9
1984	1198634489
1985	1112497099.4
1986	732765617.1
1987	496074661
1988	356605186.6
1989	408649144.9
1990	477001530.1
1991	1205844729.3
1992	1017686027.6
1993	2771783759.8
1994	1155954451.4
1995	1252556169.5
1996	2944693452.7
1997	3473192734.6
1998	2182763020.3
1999	2557311193.1
2000	2584869073.5
2001	2206443262.3
2002	3448049770.2
2003	2602139791.3
2004	2793484289
2005	6074942020.5
2006	3573096149.9
2007	9059864444.9
2008	5262553691.1
2009	4269436667.7
2010	6695589025.4
2011	4016015309.8
2012	6543791924.8
2013	7484797933.6
2014	5511603110.4
2015	5533168660.4
2016	7788909514.1
2017	11096141632.1
2018	7290511168.2
2019	6688528768.2
2020	6369678817.5
2021	5197179889.8
2022	7432888798.5