Year	TDS, current US$
1971	4012100
1972	3257100
1973	9539400
1974	4965977.8
1975	6767768.5
1976	23736536.2
1977	1109196.3
1978	2632050.6
1979	979488
1980	2499809.4
1981	8666470.3
1982	15608767.3
1983	19252442.5
1984	31034689.8
1985	28897624.4
1986	42489896.4
1987	43292336.1
1988	67022088.4
1989	23860563
1990	58586346.8
1991	53455465.2
1992	41335734.3
1993	30629869.5
1994	15514965.5
1995	27452895.1
1996	33553655.6
1997	35598072.8
1998	36403696.8
1999	25417903.3
2000	22604989.2
2001	22464324.3
2002	18772332.4
2003	20933373.7
2004	26271349
2005	47157836.6
2006	3391860.6
2007	16759734
2008	337264.6
2009	591805.6
2010	808854.1
2011	276832.8
2012	75420.4
2013	324260.8
2014	124609.8
2015	114728.2
2016	193218.1
2017	122033
2018	219484.7
2019	2253525.4
2020	2625931.6
2021	343430040.7
2022	6181390.9