Year	TDS, current US$
1983	1560000
1984	2790000
1985	2460000
1986	2410000
1987	4938040.3
1988	3301435.1
1989	2536939.5
1990	1558573.6
1991	1057887.3
1992	822629.8
1993	780583.4
1994	781906.1
1995	860273.7
1996	820258.5
1997	553188.2
1998	218441.2
1999	66936.9
2000	33911.9
2001	16818.2
2002	28331.5
2003	64765.4
2004	152871.6
2005	589998.8
2006	1871117.3
2007	2646780.9
2008	163977
2009	921357.6
2010	1175444.6
2011	2960200.2
2012	3944695.3
2013	2743359.7
2014	1578897.4
2015	2070704.5
2016	1566595.9
2017	1199528.8
2018	1519400.3
2019	1580645.7
2020	605984.2
2021	2350533.6
2022	2216147