Year	TDS, current US$
1970	409057170.1
1971	477056722.3000001
1972	573750747.6999999
1973	647625057.7999998
1974	732294444.8000001
1975	850291623.9999999
1976	1030734920.6
1977	1316372350.4
1978	1634036827.3000002
1979	1886924644
1980	2322764669.3
1981	2523980676.8999996
1982	3083750674.3000007
1983	4710437099.499999
1984	4350632145.9
1985	5160056866.699999
1986	7340644615.400001
1987	9405970088.499998
1988	11375602119.5
1989	10975515986.7
1990	12802325867.500002
1991	14443667317.3
1992	15175106992.3
1993	16190262653.199999
1994	17548122576.500004
1995	16949408156.500004
1996	18064919399.899998
1997	16436808567.7
1998	15721957208.599998
1999	19412359673.100002
2000	24055859442.6
2001	20761653947.699993
2002	25710554705.400005
2003	30380058034.899998
2004	24652960250.2
2005	22793872458.199997
2006	31400656112.8
2007	23650505052.700005
2008	23068639129.199997
2009	21571962802.000004
2010	20568717809.6
2011	27825150137.700005
2012	22123915721.899998
2013	26336409067.5
2014	22645456938.7
2015	21791855996.500004
2016	24376807918.899994
2017	29266798904.8
2018	29757610806.299995
2019	32139803956.4
2020	29560999559.299995
2021	29977605863.7
2022	29800053206.899994