Year	TDS, current US$
1970	23213873.9
1971	25805772.5
1972	26692818.200000007
1973	31640314.3
1974	40575601.50000001
1975	43698863.5
1976	45649257.3
1977	57846606.29999999
1978	64928249.099999994
1979	91578980.3
1980	124909261.60000001
1981	147295491.3
1982	165340994.6
1983	188326602.3
1984	234102852.10000002
1985	237679665.40000004
1986	404964011.29999995
1987	424535913.29999995
1988	496626752.2000001
1989	447871926.09999996
1990	445942693.2
1991	536667850.1
1992	473790355.7000001
1993	488812872.50000006
1994	494807387.7
1995	506793342.59999996
1996	520674967
1997	594359407.4
1998	636016101.9
1999	565018871.8
2000	550610934.8000001
2001	489431791.2999999
2002	816519442.9000001
2003	594031859.4999999
2004	695254171.4999999
2005	663535585.4000001
2006	720758478.8
2007	1356492567.8000002
2008	1255896894.1000001
2009	1095989296.6
2010	1040791161.3
2011	1162215483.1000001
2012	1016237299.3
2013	1083013615.5
2014	1289752567.5
2015	1330836582.5999997
2016	1104394710.1
2017	1190408576.3999996
2018	1337783528.7
2019	2108282018.1999996
2020	1971943275.8000002
2021	3437920645.4000006
2022	2144411296.8999996