Year	TDS, current US$
1970	190000
1971	3821525.3
1972	6101634
1973	143091
1974	1948333.5
1975	145746
1977	3502.7
1978	7504335.9
1979	56850.3
1980	651936.3
1981	730904
1982	900790.8
1983	6319963.5
1984	6822196.7
1985	3251792
1986	4414097.7
1987	4867309.8
1988	4336494
1989	2877932.8
1990	989721.4
1991	409195.7
1992	2665094.9
1993	4481023.5
1994	6262409.4
1995	9356803.6
1996	9011229.7
1997	8113426.7
1998	8842118.9
1999	7848399.4
2000	5375538.7
2001	4798849.7
2002	2884543.9
2003	605740.4
2004	29323208.1
2005	792615.2
2006	1180021.2
2007	1202577.8
2008	745229.5
2009	7642429.3
2010	373092.9
2011	2379337.9
2012	7700151.1
2013	10375051.1
2014	16103538.4
2015	17519838.6
2016	18129143.2
2017	16674143.2
2018	17735777.1
2019	17262750.9
2020	22528682.1
2021	11080272.6
2022	7353700.6