Year	TDS, current US$
1970	3529222
1971	3789335
1972	11016966.9
1973	12848313.1
1974	14198257.4
1975	42187687.5
1976	77412851.4
1977	40957061.6
1978	26165026.6
1979	67156053.5
1980	47507033.2
1981	76497191.6
1982	56955090.1
1983	53962534
1984	66676360
1985	102091591.8
1986	99337873.2
1987	119761545.9
1988	132755959.9
1989	103330011.3
1990	145700187.9
1991	97793836.2
1992	86803103.1
1993	128274363.7
1994	105527582.9
1995	116883702
1996	116398044.9
1997	113536532.8
1998	109990195.9
1999	105913933.5
2000	83449901.4
2001	74085858.5
2002	54031290.7
2003	55030795.6
2004	56448779.1
2005	65619055.2
2006	92019944.4
2007	121352738
2008	63349512.7
2009	78320360.5
2010	113957610.9
2011	126118116.2
2012	151449340.9
2013	170661250
2014	242963482.4
2015	242311988.5
2016	259894802.4
2017	320938898.7
2018	387245665.3
2019	382411429.6
2020	292271786.5
2021	409217649.2
2022	342758140.4