Year	TDS, current US$
1973	7452656.3
1975	1340000
1976	1390000
1977	15644687.5
1978	13700217
1979	16796.7
1980	728095.1
1981	1282588.1
1982	3707298.4
1983	7615907.9
1984	12771768.7
1985	29848053.3
1986	61566076.2
1987	51566500.4
1988	40714113.9
1989	685832.5
1990	40586722.5
1991	4670852.7
1992	6075345.8
1993	9107271.8
1994	21132946.8
1995	48192014.2
1996	39741163.4
1997	9146870.3
1998	2063658.6
1999	7510202.6
2000	9937481
2001	11453976.4
2002	37780559.6
2003	42533584.2
2004	10720975.4
2005	17118882.1
2006	1324283.2
2007	1184547.2
2008	403511.9
2009	603896.2
2010	2165268.1
2011	5019612.9
2012	6287913.2
2013	6426850.8
2014	6276079.4
2015	4355474.9
2016	1559645.6
2017	91524.7
2018	165675.5
2019	1699470.4
2020	1870889.2
2021	3678228.8
2022	12317281.1