Year	TDS, current US$
1970	1118123169.7
1971	1078263471.6
1972	1140313787.2
1973	1389252864.9
1974	1663056502.6
1975	1620914086.5
1976	1637161445.4
1977	1871720429.8
1978	3333144093.8
1979	2281740750.2
1980	4260979181.2
1981	5411998889.5
1982	4894453608.3
1983	6824734770.9
1984	6303568135.6
1985	6231161855.8
1986	7349851839.4
1987	6265276902.6
1988	5055488201.3
1989	4386859950.1
1990	6184791273.6
1991	5449279126.8
1992	4914055247
1993	5872301888.9
1994	5783538649.1
1995	8889250255.5
1996	12963794087
1997	16119704830.6
1998	19369186342.6
1999	25310657084.8
2000	24849687713.5
2001	18084634014.4
2002	5326706918.3
2003	14336213571.3
2004	12902482290
2005	10099804137.2
2006	18973957937
2007	8810729117.3
2008	9593489172.5
2009	14792600832.4
2010	15638962665.1
2011	15788530471.2
2012	13586606977.8
2013	15772427855.2
2014	17022961280.9
2015	17902687669.6
2016	25920010650.2
2017	40445152523
2018	43001851186.3
2019	43865206118
2020	29410909701.9
2021	25916580578.3
2022	33879136667.5