Year	TDS, current US$
1970	68545447
1971	65471333.9
1972	76804379.9
1973	79458944.5
1974	97531751.7
1975	169291611.6
1976	159760566.9
1977	167840524.2
1978	146715587.9
1979	160458854.9
1980	179763368
1981	212592866.5
1982	245433409.3
1983	266147034.7
1984	274622960.2
1985	320889575.3
1986	399466394.9
1987	497814026.1
1988	488140663.3
1989	423017281.5
1990	384719785.3
1991	421233295.4
1992	453029080.8
1993	408622907.9
1994	415692626.5
1995	452061757.2
1996	466972488.3
1997	531519016.7
1998	585953894.8
1999	760443761.8
2000	791294810.6
2001	743937146.7
2002	710145461.2
2003	610909156.2
2004	778146381.5
2005	441256842.9
2006	955516780
2007	872021219.7
2008	1244859329.2
2009	1423028851.3
2010	1408351248.3
2011	1314986414.1
2012	2125912485.2
2013	2142072168.4
2014	6457437244.3
2015	3550698722.1
2016	3323004378.4
2017	4211177552.5
2018	7395502263.4
2019	6240506869.6
2020	5048322888
2021	4749759434.5
2022	3137653384.8