Year	TDS, current US$
1978	5791062.9
1979	14830178.6
1980	18531396.5
1981	10831750.9
1982	3718828.9
1983	1429641
1984	3134242.8
1985	5986345.9
1986	8140436.4
1987	9031243.4
1988	9076257.8
1989	12566759.9
1990	12598922.4
1991	22062354.2
1992	62184608.3
1993	50281300.9
1994	7273445.6
1995	8478323
1996	8877665.4
1997	14457201.7
1998	19157698.2
1999	21618188.9
2000	20437556.2
2001	3783014.7
2002	3072156.9
2003	13417377.4
2004	30502884.6
2005	41158838.6
2006	278113604
2007	1392491.2
2008	424363
2009	1109626
2010	891899.3
2011	1552519.4
2012	2516878
2013	3974714.8
2014	5373418.1
2015	31302615.3
2016	30079476.4
2017	28828905.9
2018	28415476.3
2019	28459912.4
2020	774545.3
2021	643903.8
2022	10288489.5