Year	TDS, current US$
1970	2834000
1971	3899276
1972	6390330.6
1973	8631753.1
1974	12802296.1
1975	15810312.8
1976	19720547.4
1977	29421122.3
1978	34404009.7
1979	42513532.6
1980	48264927.4
1981	59527979.6
1982	72591110
1983	93062494.3
1984	102491958.5
1985	112504998.6
1986	173306979
1987	231117974.8
1988	269361362.1
1989	262020116.6
1990	316906661.3
1991	360459169.1
1992	425493655.7
1993	460600304
1994	525090034.9
1995	617376779.3
1996	608819594.8
1997	589728102
1998	594972987.3
1999	637063511.5
2000	622875189
2001	534986325.5
2002	679135552.4
2003	720269927.2
2004	785438653.4
2005	791327112
2006	1122102223
2007	1073207732.5
2008	944537296.8
2009	787181016.5
2010	813489277.8
2011	842393144.1
2012	888618696.3
2013	877854508.5
2014	1029660260
2015	979845101
2016	1011179207.7
2017	853474074.1
2018	1103375503.2
2019	1008610650.3
2020	880105113.2
2021	1286761730.1
2022	1132335092.8