Year	TDS, current US$
1970	5150000
1971	3841585.8
1972	1986831
1973	2897592.8
1974	1719825.3
1975	522256.5
1976	3221180.5
1977	8173
1978	61367.2
1979	96903.9
1980	4803999.7
1981	8038715.7
1982	9697965.9
1983	25758876.2
1984	39670865.6
1985	17850000
1986	230000
1987	158488.8
1988	1518982.7
1989	2777942.3
1990	1276183.9
1991	655534.3
1992	467659.4
1993	823871.6
1994	1076911.1
1995	1664409.5
1996	1061254.9
1997	138985.1
1998	989090.8
1999	3680843.1
2000	1856768.4
2001	1431536.6
2002	1457071.9
2003	664164.1
2004	1389172.4
2005	1810925
2006	2046957
2007	1854833.5
2008	828195516.4
2009	11344668.2
2010	1808837.6
2011	209110
2012	56970
2013	244935.4
2014	3285444
2015	36240126.1
2016	145956.1
2017	91524.7
2018	3136506.7
2019	16150495.9
2020	40127299.5
2021	32364709.6
2022	30381020.9