Year	TDS, current US$
1970	11889012
1971	18427162
1972	22396653
1973	62632081.1
1974	40767400.8
1975	64409740.8
1976	88032694.5
1977	127521275.9
1978	273530922.7
1979	326491939.7
1980	431998623.2
1981	341955233.7
1982	306214950.3
1983	242777222
1984	281443981.4
1985	246215706.7
1986	202422981.9
1987	97216486.9
1988	133433722.6
1989	145886256.6
1990	175871115.8
1991	309160789.5
1992	432877578.3
1993	156824097.2
1994	267331580.6
1995	456180982.4
1996	383590404.9
1997	432718752.2
1998	306986710.3
1999	538019446.6
2000	352409678
2001	456020613.1
2002	406616895.5
2003	374892394.9
2004	238571315.1
2005	197841391.4
2006	177962732.6
2007	872396054.7
2008	2650906196.1
2009	424085605.1
2010	452909301.7
2011	419087347.5
2012	424939767.3
2013	1160459710.4
2014	521897317.7
2015	470698838.1
2016	371601930.5
2017	623950902.7
2018	722347599.4
2019	699012044.8
2020	1417297840.6
2021	1142908569.9
2022	560136494.2