Year	TDS, current US$
1970	2570000
1971	3260000
1972	3340000
1973	3939828
1974	4085214.3
1975	4231067.5
1976	4425899.2
1977	5663806.6
1978	6594424.9
1979	15710629.2
1980	11092480.5
1981	8313882.8
1982	10938895.5
1983	10432795.3
1984	10534652.4
1985	20247534
1986	39841373.5
1987	33352217.1
1988	52668189.7
1989	62684692.2
1990	50923987.8
1991	28886143.8
1992	23092560.6
1993	32216054.4
1994	170974052.7
1995	31225177.2
1996	52272872.8
1997	75786505.2
1998	14325237.7
1999	796402.3
2000	13039267.8
2001	81453864.6
2002	14698802.1
2003	48848965.5
2004	186045568.9
2005	72428328.6
2006	44226362.5
2007	33887383.2
2008	22894829.8
2009	22542074.4
2010	24164856.7
2011	19637534.2
2012	18661460.1
2013	13880954.7
2014	14459523.2
2015	6383550.9
2016	4693689.6
2017	28143838.8
2018	109663301.5
2019	130062875.5
2020	108834383.7
2021	87615506.8
2022	106021856.4