Year	TDS, current US$
1970	290854669.1
1971	261763659.00000003
1972	291368498.29999995
1973	347108016.5
1974	387836203.8
1975	433552277.7
1976	531656813.59999996
1977	646201462.4
1978	880217074.7
1979	1003698361.7999997
1980	1324264339.3
1981	1397040139.8999999
1982	1610643236.7
1983	1857393635.3999999
1984	2306834284.4
1985	2759243639.299999
1986	3728456178.399999
1987	4758494634.700002
1988	5466416672.4
1989	5475054629.100002
1990	7007100371.300001
1991	8442158732.500001
1992	8409368739.6
1993	8988946637.099997
1994	10466299683.6
1995	11488993147.300001
1996	10867396985.399998
1997	11163068399.000004
1998	10188771877.599995
1999	10777265623.4
2000	10703416358.099998
2001	10029482646.699995
2002	14668212917.100004
2003	15577213677.4
2004	13088909553.399998
2005	11018016328.099998
2006	12994287397.500002
2007	11113182393.799997
2008	12578822197.4
2009	11380856815.999996
2010	10815454495.599998
2011	12914253755.400003
2012	14010168014.299997
2013	17500649059.199993
2014	15558084177.199999
2015	15500204861.199997
2016	16828868584.100004
2017	18639853791.4
2018	22818066576.100002
2019	24177184205.199993
2020	24340568860.199997
2021	26614136311.90001
2022	29210176880.5