Year	TDS, current US$
1970	8636000
1971	9797239.6
1972	10819543
1973	16689536.8
1974	26183260.7
1975	33468162.5
1976	35573739
1977	42558431.3
1978	55710498.5
1979	81914437.1
1980	95250776.5
1981	102173947.4
1982	126967767.8
1983	145746351.4
1984	183312307.5
1985	246091364.2
1986	339736495.7
1987	460785114
1988	519434323.6
1989	538200803.1
1990	581823593.3
1991	680127396.3
1992	863194440.5
1993	829390976.7
1994	901274425.1
1995	1091148748.9
1996	1035024549.4
1997	1081054909.8
1998	900140809.3
1999	922502057.1
2000	913060932.8
2001	936603324.1
2002	1124356948.1
2003	1541698149
2004	1057557085.6
2005	925761637.2
2006	830536596
2007	830311967.5
2008	961461497.7
2009	876884424.1
2010	919714609.6
2011	1144169271.8
2012	1200290758.4
2013	1434338672.7
2014	1337110812.7
2015	1188981405.5
2016	1443280893.9
2017	1196566400.1
2018	1350465837.9
2019	1345640720.2
2020	1457251600.3
2021	1672484329.7
2022	1593946151.3