Year	TDS, current US$
1970	260400000
1971	27225000
1972	44340000
1973	74055000
1974	61936463.9
1975	133321559.2
1976	566807912.4
1977	550300586.8
1978	481601276.20000005
1979	389880406
1980	387111777.1
1981	416240024.1
1982	474516207.70000005
1983	633397859.0999999
1984	889827706.5999999
1985	1094653911.1999998
1986	1675680992.5
1987	2176402797.4
1988	2077509355.6999998
1989	1740629226.5
1990	1377546703.9
1991	1077617035.5
1992	984414176.3999999
1993	695675128.7
1994	1552743748.5
1995	2237485664.7000003
1996	1601155679.7
1997	1215712912.2
1998	797478600.8000001
1999	808549524.3
2000	604644985.9
2001	399627017.20000005
2002	475108298.70000005
2003	747694020
2004	742378927.7
2005	349154548.20000005
2006	347211977
2007	232839698.5
2008	308041758
2009	447401899.5
2010	516984306.3
2011	631843653.6
2012	2715410490.7999997
2013	4382663361.8
2014	2882589594.7
2015	1066478550.8
2016	591390668.6999999
2017	400788215.9
2018	444620710.8
2019	955976994
2020	1308643109.1000001
2021	1475196255.9
2022	1863937596.6999998