Year	TDS, current US$
1970	47310557.9
1971	57198032.2
1972	61496841.9
1973	94233838.1
1974	123625300.8
1975	101253453.2
1976	158839737
1977	204033861.7
1978	344302083.7
1979	1127941877.4
1980	1016323193.1
1981	1404862519.3
1982	2152257144.2
1983	802737928.6
1984	1128158012.3
1985	1106555483.8
1986	1160388654.4
1987	845134376.9
1988	1066714168.6
1989	1036352779.9
1990	1091627264.1
1991	1112747950.8
1992	983734948.5
1993	918836470.7
1994	997533629.8
1995	1629458748.7
1996	1510707484.4
1997	2201415638.6
1998	1973133227.6
1999	2366032565
2000	3140704681.7
2001	2232235360.2
2002	2647753866.7
2003	2504123368.5
2004	3995093234.5
2005	4338200857
2006	4455058012.6
2007	3922951982.5
2008	2522918451.4
2009	7897086635.6
2010	1745878474.4
2011	2404297180.1
2012	2639782879
2013	3144027354.8
2014	4021312099.7
2015	5098669722
2016	5381373732
2017	6617430779.2
2018	9144698999.6
2019	9387733825.7
2020	9297287126.5
2021	6597201225
2022	5228046521.1