Year	TDS, current US$
1970	888000
1971	951000
1972	1041000
1973	1082070.4
1974	1193185.6
1975	1260457.9
1976	1642643.3
1977	1914100.9
1978	1714367.7
1979	3215474.9
1980	3115973.1
1981	3082452.7
1982	4824261.7
1983	5781335.9
1984	11383340.4
1985	16918999
1986	26768277.4
1987	31143281.6
1988	37119629
1989	41785086.2
1990	31320461.1
1991	39122369.9
1992	40014472.7
1993	57194638.9
1994	75012812.5
1995	71715779.4
1996	50765243.7
1997	52049208.8
1998	64988185.4
1999	43789559.7
2000	19129915.5
2001	23673611.8
2002	41360646.8
2003	55434635.3
2004	61718342.9
2005	64954455.7
2006	59084950
2007	35420928.1
2008	38151174.7
2009	44251266.3
2010	42945624.9
2011	49388213
2012	54787736.7
2013	61436526.5
2014	64352521.6
2015	64122894.7
2016	69026394.3
2017	121907631.8
2018	231212225.9
2019	140038734.6
2020	140935084.1
2021	197450288.5
2022	347146529