Year	TDS, current US$
1970	65000
1971	76000
1972	95000
1973	187000
1974	230000
1975	273000
1976	440768.5
1977	789427.2
1978	1663485.4
1979	3034988.2
1980	6115658.3
1981	9050365
1982	12535827.8
1983	19879474.4
1984	26661367.6
1985	43609200.8
1986	59735800.7
1987	99413234.7
1988	123776216.4
1989	123031237.2
1990	147870866.7
1991	151629538.1
1992	146959159.8
1993	151183901.1
1994	157458342.9
1995	180347060.7
1996	187261295.8
1997	185415563.5
1998	187806698.4
1999	209526409.2
2000	215021380.5
2001	231283109
2002	230762998.4
2003	246714253.2
2004	286044265.9
2005	245722480.4
2006	258041345.2
2007	270818270.6
2008	272732336.6
2009	279380738.6
2010	342583103.1
2011	396017866.1
2012	409864401.3
2013	409860771.7
2014	720978679.8
2015	634343303.1
2016	285601813.6
2017	434486801.7
2018	462990338.1
2019	484789115.4
2020	424048664.1
2021	544520018.1
2022	476624580.8