Year	TDS, current US$
1970	27000
1971	155000
1972	384000
1973	893000
1974	1515000
1975	4213000
1976	9238000
1977	37863000
1978	71849000
1979	112458000
1980	145140000
1981	183014000
1982	256659000
1983	316967811.1
1984	383668663.9
1985	489368461.2
1986	786054231.3
1987	1032716103.6
1988	1272708962.7
1989	1385609650.1
1990	1666554838
1991	1878039543.1
1992	2073824300.2
1993	2281238086.7
1994	3282873079.9
1995	2691755375.6
1996	4217864284.7
1997	2690852392.5
1998	2027596176
1999	2306078868.8
2000	2498760986.6
2001	2531318603
2002	2784475317
2003	2931056038.9
2004	2852203742.6
2005	2821884018.5
2006	2807708455.6
2007	2832153641.9
2008	2709063939.1
2009	2493611370.1
2010	2332892397.1
2011	2248764110.5
2012	2162712310.2
2013	2304577344.7
2014	1954851161.1
2015	1625803824.4
2016	1840375724.7
2017	1918769216
2018	2407908342.1
2019	3316956188.8
2020	3240471258.4
2021	2831258730.1
2022	3110102967.7