Year	TDS, current US$
1970	24262551.3
1971	28013555.6
1972	33297073.8
1973	39984465.8
1974	45841420.5
1975	57557313.8
1976	69746549.5
1977	87117172.5
1978	117034447.9
1979	143859285.2
1980	177895413.4
1981	207074557.7
1982	252389534.8
1983	294186083.2
1984	300194575.6
1985	328655419.9
1986	439158679.6
1987	567917282.2
1988	789814165.2
1989	607498819.6
1990	668603604
1991	670405206.1
1992	320118113
1993	14297000
1995	4000
2001	4718589.3
2002	78178872.5
2003	122206411.3
2004	136031342
2005	165015899.6
2006	407338090.2
2007	265042268.2
2008	303642216.2
2009	261782026.2
2010	289746378.3
2011	351406228.6
2012	462999804.2
2013	542741325.1
2014	641139527.1
2015	561223785.8
2016	624517000.2
2017	719860947.8
2018	894132673.6
2019	779898231.9
2020	598261427.3
2021	610232712.6
2022	593487986