Year	TDS, current US$
1970	632500
1971	946473
1972	1637472.8
1973	2457609.6
1974	3280410
1975	7063903.9
1976	4286867.7
1977	5881631.1
1978	8187951.6
1979	9275969.5
1980	14139666.2
1981	9753163.6
1982	14495331.6
1983	25131098
1984	32574688.8
1985	47553087.6
1986	45484782.5
1987	72914980.4
1988	76350009.5
1989	72627950.2
1990	105284120.1
1991	88356864.5
1992	96672848.7
1993	89295579.2
1994	91895120.2
1995	91396808.9
1996	151129997.5
1997	103180002.3
1998	76260324.4
1999	74028575.9
2000	68697440.2
2001	51929578.6
2002	60680413.7
2003	50377926.5
2004	48597143.6
2005	53543076.4
2006	56339044.3
2007	47222233
2008	69678615.1
2009	46701908.3
2010	79549085.2
2011	79404451.4
2012	59247866.4
2013	193276586.5
2014	64773771.6
2015	247954367.9
2016	168635328.6
2017	176311539.7
2018	184971082
2019	196924267.9
2020	183240052.8
2021	161888272.9
2022	173937529.3