Year	TDS, current US$
1981	7606.8
1982	61220.1
1983	80497.2
1984	89216.1
1985	453647.4
1986	78232.9
1987	2017281.4
1988	1119020.9
1989	1804604
1990	742101.2
1991	1044810.5
1992	1648002.2
1993	1736116.9
1994	2243036.2
1995	1609060.3
1996	2243000.7
1997	2262018.8
1998	2613264.8
1999	2945844.2
2000	3077108.4
2001	2081027
2002	2529632.2
2003	3040640.4
2004	4404648.6
2005	3424762
2006	5335038.7
2007	5393550.4
2008	2054543.1
2009	1760996.5
2010	1455327.8
2011	1441785.1
2012	1999372.7
2013	1838110.8
2014	1437463
2015	1007818.5
2016	1021280.7
2017	2457672.5
2018	3079289.9
2019	6707905.2
2020	1955008.3
2021	2518660.5
2022	2790557.8