Year	TDS, current US$
1970	325001292.5
1971	384353110.50000006
1972	469303571.7
1973	578699701.6999999
1974	647992338.7
1975	732793545.4
1976	889651934.3
1977	1103850814.3
1978	1314060302.2
1979	1464950420.8999999
1980	1807372697.9999998
1981	1918675107.1
1982	2252019489.7
1983	3612552628.8
1984	3116127750.6000004
1985	3639379162.9999995
1986	4988167827.7
1987	6153353377.299998
1988	7006485101.1
1989	6767258532.100001
1990	8062540961.500001
1991	9694689722.699999
1992	9582615252.800001
1993	10896903325.799997
1994	10641626363.1
1995	10318626841.900002
1996	10109066039.599998
1997	10092552685.200003
1998	9655295481
1999	12703349437.899998
2000	14967424885.300001
2001	11408546280.099997
2002	13783640281.1
2003	18898837241.499996
2004	14730203725.999998
2005	13719005749.6
2006	22371828190.3
2007	14198925373.399998
2008	13848858305.2
2009	12904941981.1
2010	12508380909.399998
2011	17845755133.600002
2012	11592320759.2
2013	15790830309.699999
2014	11929452218.9
2015	11721166018.600002
2016	13198737750.800003
2017	16212402055.199995
2018	15663917233
2019	16648276088.800001
2020	14655259742.7
2021	16118727658.999998
2022	16108523326.7