Year	TDS, current US$
1970	507700
1971	385137.9
1972	422654.3
1973	625729.8
1974	512763.9
1975	1088050.3
1976	543801.3
1977	458540
1978	1094694.6
1979	2422984.8
1980	5452080
1981	5648911
1982	9952608.2
1983	21450046.8
1984	14312716.9
1985	19059271.1
1986	14756976.7
1987	15449745.8
1988	24376095.3
1989	22343720.4
1990	23287755.3
1991	26360544.1
1992	33863537.4
1993	32757530.7
1994	29762746.5
1995	40867805.9
1996	38143488.1
1997	47700626.3
1998	51699900.6
1999	54967608.6
2000	61738453.5
2001	68749825
2002	68142384.2
2003	67102102.7
2004	53520189.7
2005	79625109
2006	45926786.5
2007	98476380.9
2008	37507479.6
2009	38256553.2
2010	34890995.9
2011	40726635.1
2012	39991190.5
2013	45748298.2
2014	43893650.6
2015	53141159.2
2016	58018925
2017	55915961.9
2018	79356947.7
2019	75491401.2
2020	73079643.2
2021	339943599
2022	301006405.5