Year	TDS, current US$
1970	2723660
1971	1481282.6
1972	2396857.5
1973	3449460.5
1974	6871749.3
1975	11696120.4
1976	8491392.5
1977	11093918.6
1978	20638650.2
1979	18565226.1
1980	35843093.7
1981	30635669.6
1982	37164286.9
1983	40901087.6
1984	53841530.7
1985	63636953.7
1986	66618391.3
1987	67343818.4
1988	67316689
1989	67451568.9
1990	80939322.3
1991	79766881.3
1992	60749820.9
1993	54824778.2
1994	68155311.6
1995	43432722.7
1996	29679316.5
1997	21436198.3
1998	21784971.1
1999	29102747.9
2000	26487896.3
2001	18381295.9
2002	18953857.3
2003	17977330.4
2004	12870281.9
2005	15106585.3
2006	14579585.6
2007	28985655.1
2008	59671189.8
2009	78620853.3
2010	59425967
2011	260445617.8
2012	113391305.8
2013	116535682.8
2014	150331679.2
2015	339822861.9
2016	106319574.5
2017	169162269.8
2018	107166283.1
2019	211185354.3
2020	274829985.1
2021	49078503.7
2022	173005933.9