Year	TDS, current US$
1970	8109962.2
1971	9938028.9
1972	12627011.2
1973	14986941.4
1974	16845036.6
1975	18543000
1976	26720000
1977	33064000
1978	44744000
1979	54101000
1980	57861000
1981	58151000
1982	66806000
1983	101162000
1984	70613000
1985	107767000
1986	134084209.5
1987	136379776.3
1988	159227000
1989	165929919.6
1990	165091665.4
1991	186077378.2
1992	194077051.7
1993	184854458.9
1994	214906671.8
1995	279527599.6
1996	222356750.3
1997	260134285.3
1998	257300904.7
1999	285943108.7
2000	242753208.5
2001	243609375.3
2002	326381923.6
2003	236996831.9
2004	230040124.6
2005	332648566.7
2006	262601226.1
2007	233788942
2008	501288898.1
2009	270430035.5
2010	280962323.3
2011	307386376.6
2012	340070843.8
2013	652708912.1
2014	305133000
2015	248838000
2016	255859000
2017	302037000
2018	385186216.9
2019	952548268.3
2020	583477000
2021	366839000
2022	486867000