Year	TDS, current US$
1970	9428900
1971	10428098.8
1972	11431172.9
1973	16147891.4
1974	14545263.8
1975	7948809.9
1976	7388741.7
1977	5927940.3
1978	8369053.3
1979	14559686.7
1980	65180187.5
1981	107951441.3
1982	208036201
1983	505025019.7
1984	357888502.2
1985	421997512.4
1986	475846973.6
1987	533528147.5
1988	534313506.5
1989	440856726.6
1990	473093569.2
1991	463423166
1992	603857232.3
1993	628730361.3
1994	604274139.8
1995	647577206.7
1996	649688964.9
1997	671768479
1998	954489138.8
1999	638495706.6
2000	427267288.1
2001	173859761.7
2002	113309495.5
2003	79695307.1
2004	137833225.7
2005	249160085.1
2006	106667355.8
2007	110631623.9
2008	93966172.4
2009	121724851.6
2010	386941958.2
2011	1155002008.1
2012	742077690.7
2013	585326955.1
2014	514533027.1
2015	665673272.9
2016	1240935767.6
2017	718479680.5
2018	605693516.9
2019	1592245921.6
2020	985411946.4
2021	607654085.1
2022	376288463.6