Year	TDS, current US$
1970	163480629.9
1971	196979489.4
1972	182166753.1
1973	266643793.8
1974	253876376.7
1975	357308102.1
1976	378440650.1
1977	571913685.3
1978	1081614574
1979	1310442917.5
1980	1617343363.8
1981	1875278335.8
1982	1939933823.4
1983	2213308423.1
1984	2677381121.1
1985	3262398218.2
1986	3655656506.1
1987	3458438417
1988	4388857404.7
1989	4399034073
1990	5295042171.4
1991	4911474975
1992	5908581079.5
1993	6440384852.4
1994	7880221883.8
1995	8597436783.5
1996	9532671151.7
1997	11818138478.5
1998	12756628984.9
1999	16247201333
2000	14013177833.8
2001	20313954779.2
2002	19727012317.6
2003	15080287211.6
2004	12884481489.8
2005	18044350767
2006	14655559538.4
2007	22027142346.9
2008	17288798740.9
2009	12725883786.9
2010	10968323098.1
2011	10504580076.5
2012	15410169256.4
2013	14823031708.3
2014	27142840023.3
2015	19765713921.2
2016	15126877501.9
2017	16191350645.4
2018	20586036987
2019	32246431215.3
2020	22587360267.7
2021	18124433123.4
2022	43856072763.4