Year	TDS, current US$
1978	2000
1979	17738.3
1980	38200.4
1981	63632.8
1982	222578.6
1983	519729.3
1984	1101614.7
1985	1353244.3
1986	856740.6
1987	497026.5
1988	440844.8
1989	447482.5
1990	666512.8
1991	7398930.6
1992	5083419.4
1993	2107518.3
1994	1405313.8
1995	862068.9
1996	1357383.6
1997	1977102.4
1998	1250045.3
1999	1927912.4
2000	2008548.5
2001	1968367.1
2002	3766914.6
2003	2581916.9
2004	3011406.3
2005	3849105.1
2006	3489564.4
2007	25757149.6
2008	12027643.1
2009	9808326.5
2010	4255323.8
2011	3554242.6
2012	7406498
2013	572636.3
2014	776282.1
2015	2134309.3
2016	3183797.7
2017	381000
2018	546000
2019	411000
2020	455005.9
2021	539775.7
2022	576956.9