Year	TDS, current US$
1975	6218496
1976	13104085.7
1978	12523925
1979	10336420
1980	16230000
1981	17080000
1982	16114781.7
1983	35221880.3
1984	69066880.5
1985	97051911
1986	111592406.9
1987	90397572.4
1988	96811624.7
1989	86733464.5
1990	56080245.7
1991	41784265
1992	31715248.1
1993	11770591.1
1994	26162097.3
1995	30353256.2
1996	51998842.5
1997	59539286.9
1998	55862599.6
1999	39324411.3
2000	24791736.2
2001	17002826.1
2002	21066843.4
2003	26523370.3
2004	31195757.3
2005	37438332.3
2006	1851389.4
2007	1634620.4
2008	418700.4
2009	670275.6
2010	1159570
2011	1868661.7
2012	1917577.5
2013	2165550.6
2014	1955766.2
2015	1520848.4
2016	480960.2
2017	128966.7
2018	232228.9
2019	2375113.6
2020	756435.5
2021	393180.2