Year	TDS, current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	4360000
1976	0
1977	0
1978	250000
1979	410000
1980	8820000
1981	0
1982	700000
1983	950000
1984	940000
1985	6270000
1986	8800000
1987	2652395.6
1988	2748955.5
1989	3268921.6
1990	825446.6
1999	368627.1
2000	398309.4
2001	197537.4
2002	180677.3
2003	152805.8
2004	228922.9
2005	301329.3
2006	426031.9
2007	376041.9
2008	87881
2009	241921.6
2010	330647.9
2011	113165.3
2012	30830.7
2013	132553.2
2014	51667.5
2015	47570.2
2016	79233.3
2017	49922.6
2018	89209.9
2019	921582.8
2020	292544.1
2021	122512.7
2022	2530636.5