Year	TDS, current US$
1971	10000
1972	46000
1973	89000
1974	355000
1975	1073000
1976	1022000
1977	1396000
1978	2262000
1979	2818000
1980	3167918.6
1981	3569920.6
1982	4300955.4
1983	4987923.5
1984	6473009
1985	7763005.1
1986	10483812.3
1987	13328094.3
1988	15572327.7
1989	16558561.9
1990	19893340.1
1991	24073409.2
1992	29893059.6
1993	31162245.6
1994	38788109.4
1995	40314655.9
1996	43420748
1997	44684561.1
1998	43983029.9
1999	58667682.4
2000	59083389.3
2001	59311819.9
2002	66840761
2003	73642636.4
2004	82887681.8
2005	86460710.1
2006	93208195.7
2007	106219067.8
2008	122457011.2
2009	134031678.8
2010	141994885.9
2011	153670130.7
2012	160754930.6
2013	164773256.3
2014	171280663
2015	165655624.1
2016	171104004.4
2017	171015919.6
2018	192823543.1
2019	200652409.4
2020	222297987.9
2021	246159991.4
2022	247299541.2