Year	TDS, current US$
1970	24900000
1971	28185002.5
1972	18174618
1973	9145899.8
1974	5616492.2
1975	3242848.5
1976	0
1977	0
1978	6036531.9
1979	29724959.8
1980	33139079
1981	14095461.8
1982	7130667.6
1983	20152691.4
1984	26820782.7
1985	46442053.4
1986	85186739.8
1987	238046285.7
1988	323602466.6
1989	226191420.9
1990	153471981.2
1991	107009466.1
1992	84092758.8
1993	80668198
1994	93442080.6
1995	117411422.8
1996	132529099.9
1997	170529203.5
1998	141188979
1999	80624528.7
2000	42111163.3
2001	68710738.5
2002	8028229.8
2003	5487258.9
2004	27921445.4
2005	36186393.6
2006	4303699.1
2007	4209137.5
2008	1636450.7
2009	2309402.7
2010	1772891
2011	17215996.3
2012	32466404.2
2013	32749745.5
2014	32318009.8
2015	60088205.5
2016	64828159.4
2017	74677252.8
2018	110201127.5
2019	111924636.3
2020	90857233.1
2021	119345846
2022	137413162.4