Year	TDS, current US$
1970	3612040.6
1971	9483351.5
1972	9314889.2
1973	11017458.2
1974	11909594.5
1975	10836620.8
1976	8222086.1
1977	8030942.8
1978	7683379.5
1979	9628863.8
1980	52537476
1981	100793240.2
1982	117129152.8
1983	107948963.7
1984	124942185.3
1985	125610662.2
1986	99531811.2
1987	99052257.2
1988	94788451.6
1989	91820050.5
1990	99406701.4
1991	113072157
1992	138180006.5
1993	135541639.3
1994	185057236.8
1995	225114915.4
1996	302244615.3
1997	739916057.8
1998	538608287.8
1999	782412207.3
2000	1490942593.5
2001	1491607487.6
2002	2222495517.5
2003	3339978763.7
2004	4459456575.6
2005	3633866023.3
2006	4523190197.7
2007	4755042479
2008	4439130328.5
2009	11094006573.3
2010	11196248804.6
2011	12927343849.6
2012	12375363266.6
2013	12253551676.8
2014	13409936191.1
2015	14055379749.2
2016	15158516656.9
2017	16488904384
2018	16464502759.2
2019	18525296383.2
2020	12881896895.5
2021	7304517827.6
2022	4270206042.4