Year	TDS, current US$
1970	13104426.9
1971	15648794.3
1972	19123735.5
1973	20275438
1974	27806782.8
1975	35576295.2
1976	36909563.9
1977	49080293.6
1978	59703758.8
1979	93762032.1
1980	154592123.9
1981	177933120.3
1982	150892108.7
1983	110370869.5
1984	144570567.2
1985	165861514.2
1986	231331620.5
1987	245084724
1988	325120400.1
1989	158441394.1
1990	222499461.6
1991	266159949.9
1992	633130512.2
1993	291890210.4
1994	261899856.4
1995	300204045.7
1996	253244291.4
1997	295951261.7
1998	263444529.5
1999	262226669.5
2000	356043778.5
2001	362732217.4
2002	344367824.8
2003	363653191.4
2004	492527994.5
2005	493284815.2
2006	440227796.7
2007	424712600.9
2008	560668402.4
2009	490875101.6
2010	511313871.7
2011	935836210.7
2012	1994901878.5
2013	1661927841.9
2014	3132894834.6
2015	2029343169.1
2016	1435538929.9
2017	1886896115.3
2018	2502712862.8
2019	1525607571.7
2020	1151103090.7
2021	1254608723.3
2022	2145267295.3