Year	TDS, current US$
1970	5400000
1971	0
1972	0
1973	0
1974	1671718.2
1975	0
1976	0
1977	0
1978	5297620.3
1979	9468160.7
1980	18562412.5
1981	14647623.3
1982	10893615.8
1983	8332525.9
1984	16643848.9
1985	8330995.4
1986	46517423.6
1987	2723126.2
1988	1043124.4
1989	1707530.8
1990	4827776.7
1991	8021056.9
1992	8550278
1993	9981413.6
1994	118695071.3
1995	4267989
1996	4176785.5
1997	839414.9
1998	839845.3
1999	14745636.8
2000	28743159.5
2001	78589586.9
2002	2053707.2
2003	2638197.6
2004	2702451.2
2005	4094710
2006	6524732.7
2007	1119400.3
2008	421216.4
2009	673452.5
2010	2635834.3
2011	5327018.7
2012	7126826.7
2013	7222194
2014	12416911.6
2015	29703415.8
2016	1232981.9
2017	16245641
2018	18533002.1
2019	18170516.9
2020	42622282.8
2021	46757097.5
2022	45603649.5