Year	TDS, current US$
1970	72250000
1971	52412000
1972	114280000
1973	85090000
1974	63102000
1975	18250000
1976	67190000
1977	174140000
1978	225108000
1979	205838000
1980	307740000
1981	352130000
1982	436710000
1983	668780000
1984	877140000
1985	949190000
1986	1116320000
1987	1197228513.6
1988	1235844345.1
1989	933155304.8
1990	471992561
1991	202186470.4
1992	243415286.4
1993	129449773.50000001
1994	313733396.3999999
1995	745376293.4
1996	1448125078.1999998
1997	1484944245.0999997
1998	2612952641.3
1999	7110613274
2000	6361012831.099999
2001	7298749044.799999
2002	9939475846.4
2003	5282230735.900001
2004	8839507317.4
2005	13949598342.8
2006	10194581597
2007	7299340612.400001
2008	3041579812.299999
2009	1334785058.4000003
2010	2809364999.9
2011	3561885030.2999997
2012	7121709681.8
2013	10128891213.900002
2014	6573194779.700001
2015	2185317941.7999997
2016	576999392.6
2017	1679653677.1999998
2018	2967207554.5000005
2019	2482101451.4
2020	1757896122.9
2021	2001527719.7
2022	3197516137.8999996