Year	TDS, current US$
1970	341000
1971	760000
1972	1730078.9
1973	2684242.7
1974	3751052.3
1975	9189859.6
1976	10348457.8
1977	15288965.8
1978	17031422.5
1979	21533513.8
1980	26228986.5
1981	30061197.3
1982	32972874.1
1983	35691724.3
1984	41673727.1
1985	52543936.8
1986	62914418.1
1987	69258212.1
1988	67809829.6
1989	64285200.7
1990	71886481.6
1991	98572594.1
1992	86481881.3
1993	89241397.9
1994	101550582.8
1995	134753119.6
1996	119485931
1997	98893871.7
1998	99806284.9
1999	81123286.8
2000	52782998.8
2001	68121698.3
2002	45144572
2003	47680940.2
2004	65845100.3
2005	64152016.3
2006	55915430.4
2007	29458868.1
2008	33898905.4
2009	36973584
2010	46036918.1
2011	57374603.9
2012	66429890.7
2013	68480338
2014	80859446.6
2015	97027491.9
2016	114422981.1
2017	142114828.9
2018	161255169.8
2019	186769332.3
2020	221280339.6
2021	278103990.4
2022	315801582.5