Year	TDS, current US$
1970	14200000
1971	35911000
1972	30694000
1975	24000
1976	3350000
1977	6820205.7
1978	8833891.2
1979	42643793.2
1980	99489903.6
1981	89414805.7
1982	87324318.9
1983	98512868.5
1984	138749103.9
1985	256764097.7
1986	442088634.3
1987	417615434.3
1988	321340123.4
1989	329738034.5
1990	299555671.7
1991	234455452
1992	185472010.5
1993	187229702.1
1994	164751634.6
1995	107159449.1
1996	48888860.8
1997	3244820.2
1999	4522781.2
2000	4905251.1
2001	2432707.5
2002	2225071.8
2003	1881829.8
2004	2819226.2
2005	3710923.3
2006	5246658.6
2007	4631023.4
2008	1082270.4
2009	2024312.2
2010	2766741.8
2011	946926
2012	257981
2013	1109156.7
2014	427016.5
2015	393154
2016	658887.7
2017	416021.5
2018	751912
2019	7707029.4
2020	28272298
2021	955568798.6
2022	57528822.5