Year	TDS, current US$
1970	3795467.9
1971	4761429.1
1972	6394070.7
1973	8412614.2
1974	10860555.5
1975	19719388.7
1976	23807001.2
1977	35405075.7
1978	86288055.3
1979	80406259.5
1980	138820851.2
1981	152463823.8
1982	132254809.6
1983	144895699.4
1984	124428957.2
1985	170254724.6
1986	153625369.8
1987	156414952.2
1988	161868792.2
1989	177208186.1
1990	179035904.6
1991	207562457.7
1992	234501266.5
1993	210934919.9
1994	183464810.4
1995	226078842.2
1996	268116899.5
1997	163247909.3
1998	232708797.5
1999	222612628.5
2000	168406158.5
2001	142561791.9
2002	104741463.2
2003	88428239
2004	122915687.5
2005	130829740.7
2006	88006863.5
2007	71706184.5
2008	73471895
2009	164283959.5
2010	191393963.2
2011	147292217.8
2012	169890404.5
2013	248736464
2014	306062240.5
2015	469107992.3
2016	737737089.3
2017	833601148.9
2018	1045615091
2019	1240859252.4
2020	1266730345.2
2021	1960126404.5
2022	1984475242.5