Year	TDS, current US$
1970	2367404
1971	2423047.3
1972	5289591.3
1973	6619978.9
1974	8547030.6
1975	16587053.5
1976	23002292.4
1977	56712966.9
1978	57096859.2
1979	30159558.3
1980	52343184.1
1981	88883950.4
1982	84625104.2
1983	59392354.3
1984	91272059.3
1985	111297209.3
1986	144473113.6
1987	90556923
1988	131445490.8
1989	91333488.3
1990	85653998.2
1991	54163005.1
1992	36125169.1
1993	26471784
1994	22891965.8
1995	29080814.8
1996	58198681.8
1997	55910131.9
1998	39848047.2
1999	42434840.4
2000	30242868
2001	34276623.7
2002	14819785.4
2003	19375692
2004	21991589.8
2005	21250892
2006	26752936.4
2007	15449575.1
2008	195252221.3
2009	53834765.7
2010	36453622
2011	15181725.6
2012	23382552.7
2013	52450005.3
2014	61142732.1
2015	60651443.7
2016	90389313.9
2017	107263208.7
2018	114822691.9
2019	113529223.4
2020	105187159.2
2021	171235078.4
2022	240039424.1