Year	TDS, current US$
1973	440000
1974	917000
1975	2104000
1976	7130000
1977	8225000
1978	9921057.3
1979	13375886.1
1980	12106109.8
1981	14960188.3
1982	27383382.6
1983	37695276.2
1984	52071665.6
1985	53849178.9
1986	77670267.4
1987	94500322.2
1988	82811162.7
1989	88753401.5
1990	112473478.1
1991	128251157.6
1992	132742388.7
1993	140398574
1994	155274839.1
1995	190837776.4
1996	196014201.2
1997	207199983
1998	216502532
1999	248479041.8
2000	261220463.6
2001	275487717.2
2002	302606771.3
2003	345628020.3
2004	419166745.8
2005	423638779.2
2006	464873783.3
2007	527061667.9
2008	596149078.7
2009	633250658.6
2010	658180762.3
2011	723663782.2
2012	740854088
2013	1038408975.9
2014	1087542446.5
2015	803796071.2
2016	874537294.6
2017	1038909571.1
2018	1098705366.5
2019	1235381991.6
2020	1294396677.9
2021	1513269047.9
2022	1874085342.4