Year	TDS, current US$
1970	26940000
1971	22698455.8
1972	36935514
1973	57081384.8
1974	16404487
1975	0
1976	5490000
1977	10260000
1978	12820000
1979	97777235.7
1980	202440000
1981	100960000
1982	96490000
1983	146300000
1984	143990000
1985	96570000
1986	70660000
1987	1013804.6
1988	708410.5
1989	37710534.9
1990	136820495.9
1991	70853809.7
1992	100067833.4
1993	906010171
1994	47312482.1
1995	52403865.5
1996	41449914.3
1997	121078032.6
1998	190457640.1
1999	183879989.4
2000	179635613.6
2001	179059713.7
2002	185232453.4
2003	117858283.6
2004	45723467.3
2005	46292350.8
2006	46899672.5
2007	25730941.9
2008	1153378.5
2009	2199083.5
2010	3005611.6
2011	1028680.1
2012	280254
2013	1204917
2014	463487.7
2015	428132.1
2016	715880.1
2017	452076.7
2018	815633.3
2019	8371619
2020	2663544.4
2021	1428839.5
2022	29616878.5