Year	TDS, current US$
1970	1000000
1971	90272.3
1973	107318.3
1974	108240.8
1975	813748.5
1976	773545.1
1977	1109196.3
1979	5168.2
1980	24730.1
1981	34215.1
1982	32023.6
1983	303520.8
1984	712555.9
1985	2334892.5
1986	5700195.2
1987	6057940.8
1988	4345903.6
1989	1151173.1
1990	331264.7
1991	41056.4
1999	339489.6
2000	368198.7
2001	182604.2
2002	167018.6
2003	141254.2
2004	211617.2
2005	278549.8
2006	393825.5
2007	347614.6
2008	81237.6
2009	174099.4
2010	237951.5
2011	81439.6
2012	22187.5
2013	95392.2
2014	36471.2
2015	33579
2016	56992.4
2017	36055.2
2018	65137.4
2019	663208
2020	344087.5
2021	1282109.1
2022	3783241.4