Year	TDS, current US$
1970	27000000
1971	27084000
1972	97995000
1973	11471000
1975	6910000
1976	20500000
1977	26320000
1978	110698000
1979	125448000
1980	206370000
1981	202840000
1982	277370000
1983	333240000
1984	394680000
1985	412000000
1986	498590000
1987	533449808.1
1988	485944081.5
1989	249576387.8
1990	52977925.6
1994	3810718.4
1995	24413868.4
1996	29699166.3
1997	56637113.1
1998	248153246
1999	304782287.4
2000	145412550.5
2001	1539516954.6
2002	7181795048.3
2003	2310483594.4
2004	5643023747.2
2005	8736257739.4
2006	8298549055.5
2007	5733277277.6
2008	2376434092.2
2009	902081280.2
2010	2305957076
2011	2881475318.2
2012	2033909841.9
2013	860297004.6
2014	814522.7
2015	751329.9
2016	1258003
2017	794601.1
2018	1434438.5
2019	14706636.9
2020	4679312.6
2021	4186798.8
2022	86804446.4