Year	TDS, current US$
1970	1617000
1971	725163.8
1972	1912555
1973	3639276.9
1974	5455972.3
1975	7603673.5
1976	16232778.1
1977	20057989.1
1978	28742264.2
1979	38155187.7
1980	49113121
1981	52799492
1982	56599963.3
1983	69753567.2
1984	88668440.7
1985	107131615
1986	139952431.5
1987	179563646.3
1988	202920174.1
1989	189628439.6
1990	226656964
1991	220523229.9
1992	218549898.6
1993	225077644.5
1994	231199193.8
1995	227538007.9
1996	208706451.1
1997	185876559.1
1998	174731458.2
1999	177532035.6
2000	149982085.8
2001	124266246.4
2002	110755460.1
2003	136731117
2004	123258809.2
2005	375476055.5
2006	256062988.5
2007	255886153.1
2008	140317973
2009	139860432.3
2010	145727409.3
2011	168326124
2012	171970044.7
2013	184781730.9
2014	195936402.1
2015	193003023.4
2016	199356384.8
2017	290604549.2
2018	597880647.8
2019	935966878.3
2020	870408669.2
2021	1056011657
2022	1080956069.2