Year	TDS, current US$
1970	1000
1971	14000
1972	47503.1
1973	64091
1974	119471.2
1975	164290.3
1976	202837.2
1977	292574.8
1978	1113810.6
1979	1765587.6
1980	2328507.3
1981	2885979
1982	5180804.1
1983	6436492.3
1984	5647476.9
1985	10679421.3
1986	11783316.4
1987	10895845.7
1988	10811946.1
1989	11291662.9
1990	30091749
1991	21137908.7
1992	20622626.8
1993	23946615.3
1994	20138546.1
1995	24100068.5
1996	23930756.4
1997	26902301.9
1998	27284005.5
1999	31121934.7
2000	26512661.6
2001	22848340.7
2002	26669668
2003	36842638.6
2004	28678680.5
2005	33103306.1
2006	33192448.3
2007	26326048.1
2008	22221539.5
2009	27980311.2
2010	32825590.4
2011	36205214.5
2012	35511264.8
2013	43016942.6
2014	55415234.4
2015	49108107.5
2016	65510955.4
2017	70393941.4
2018	189943533.7
2019	117483850.3
2020	91113746.3
2021	107495664.5
2022	174116573.5