Year	TDS, current US$
1970	15401091
1971	16435971.7
1972	19785326.2
1973	27280444.2
1974	27663288.7
1975	39053141
1976	38235883.5
1977	68532073.8
1978	72741167.5
1979	98290458.4
1980	109301892.8
1981	101288857.2
1982	89429249.9
1983	71058221
1984	110846415.4
1985	71935129.8
1986	71730332.7
1987	164236664.1
1988	127461437.9
1989	118766703.3
1990	169552991.6
1991	136080070
1992	86501088
1993	86020241
1994	102609987.7
1995	176797006.5
1996	116482603.9
1997	158801596
1998	162294107.1
1999	137696655.4
2000	171984931.4
2001	111148589.6
2002	104328002
2003	107408299
2004	174437241
2005	167756165.7
2006	167002388.8
2007	161928029.5
2008	128813089.1
2009	119519084.9
2010	80218497.8
2011	177843095.7
2012	126934484.5
2013	39023916.2
2014	51795747.8
2015	76741224.8
2016	57565167.4
2017	81532018
2018	114865276.1
2019	112910112.6
2020	140566439
2021	167740412.9
2022	238037632