Year	TDS, current US$
1971	10030.3
1972	10857
1973	11924.3
1974	12026.8
1975	12145.5
1978	15028.7
1979	34885.4
1980	16920.6
1981	74329.3
1982	69568.5
1983	417354.9
1984	2289732.8
1985	5557639.4
1986	9846843.4
1987	29962246.9
1988	37704377.5
1989	22517100.4
1990	19036863.1
1991	13985186.8
1992	10973091.6
1993	10411502.5
1994	11026881.5
1995	11348936.3
1996	12645047.6
1997	15907600.6
1998	14592141.9
1999	6926099.3
2000	2639791.4
2001	1331426.6
2002	3061953.5
2003	6011652.6
2004	7627740.3
2005	6133644.4
2006	114804411.5
2007	690681.4
2008	340143.5
2009	496868.1
2010	459704.4
2011	4738700.5
2012	6472831.2
2013	8481213.7
2014	10546244.8
2015	10500430.3
2016	6966973.3
2017	6728455
2018	8269615.9
2019	11578506
2020	22732069.9
2021	29082510.1
2022	24490031