Year	TDS, current US$
1970	34452863.1
1971	35850674.5
1972	51550641.4
1973	64382424.4
1974	82147351.3
1975	92339229.8
1976	143579052.9
1977	174052027.2
1978	377418605
1979	297906555.1
1980	370808624.2
1981	369926886
1982	548732752.7
1983	466225077.2
1984	541710030.4
1985	370900881.1
1986	256215781.4
1987	228810275
1988	378472363.3
1989	298406779.5
1990	391909648.5
1991	336466925.9
1992	294535505.8
1993	343359743.6
1994	354356329.5
1995	378148778
1996	418851090.4
1997	481609414
1998	439103453
1999	424413707.9
2000	641452247.7
2001	550623651.9
2002	482993543.6
2003	435249407.8
2004	521601537.5
2005	532656988.8
2006	444548915.5
2007	742974995.6
2008	950761592.2
2009	584773573.4
2010	655737540.5
2011	446645060.4
2012	650667090.6
2013	549975195.8
2014	983884600
2015	993696828.8
2016	775631452.1
2017	979347346.2
2018	1007191963.7
2019	1079446926.5
2020	1175621100.7
2021	1634990812.1
2022	2404456023.4