Year	TDS, current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	27905352.7
1977	11629047
1978	30290365.1
1979	3059580.4
1980	98920.5
1981	5364676.8
1982	29230482.7
1983	39672626.9
1984	88543169.3
1985	162655515.8
1986	189101505.2
1987	192624174.4
1988	228149861.1
1989	199952877.5
1990	154756310.9
1991	137339215.6
1992	117471241.1
1993	67003101.1
1994	87291372
1995	94068724.1
1996	52657694.7
1997	25046214.5
1998	2747474.4
1999	13261827.8
2000	44339322.8
2001	70355629.4
2002	89860683.7
2003	108125700.8
2004	129844719.5
2005	94076853.9
2006	60689852
2007	50363966.3
2008	49479616.4
2009	146765304.2
2010	11739128.1
2011	18985195.9
2012	26410186.1
2013	614228.5
2014	7286634.5
2015	54817702.9
2016	64555707.9
2017	119739319
2018	160759066.7
2019	169677616
2020	169775880.7
2021	205634643.4
2022	203277963.2