Year	TDS, current US$
1970	29000
1971	174000
1972	652000
1973	1487000
1974	2236000
1975	3409000
1976	4581000
1977	5523000
1978	6721000
1979	7561000
1980	8568586.6
1981	9621246.1
1982	10795680.4
1983	12193522.1
1984	14029615.9
1985	16013427.7
1986	21379296.2
1987	36418798.8
1988	64058343.2
1989	54322088.3
1990	62195325.6
1991	69959590.4
1992	83485058.5
1993	102514506.2
1994	104749842.1
1995	90755689.2
1996	86651578.1
1997	80840207.8
1998	79449406.4
1999	86622889.3
2000	84337240.9
2001	77782132.7
2002	74637453.5
2003	72617999.8
2004	70670483.8
2005	70486123.1
2006	108806671.1
2007	164966718.5
2008	80471729.4
2009	48761456.8
2010	47543372
2011	51806919.7
2012	53295275.1
2013	57327657.5
2014	60478406.2
2015	61399312.7
2016	64689070.3
2017	74938247.7
2018	89960652.9
2019	117119177.2
2020	112341935.3
2021	118574385
2022	157640274.7