Year	TDS, current US$
1970	8100000
1971	15717401.8
1972	21247149
1973	9622869.8
1974	3692212.2
1975	7979593.5
1976	24245445
1977	22872794.3
1978	25586378.8
1979	43786367.2
1980	91558380
1981	43604120.3
1982	82596534.5
1983	89323954.1
1984	60798003.8
1985	40130000
1986	21780000
1987	13945706.8
1988	458383.3
1989	14097384.2
1990	1418736.4
1992	1762174.3
1993	3041342.9
1994	295004.9
1995	52054900.9
1996	47606934.7
1997	57232959.9
1998	58227462.8
1999	47253818.8
2000	57339960.5
2001	54556955.3
2002	24280890
2003	27352714.9
2004	33002436.1
2005	30982717
2006	30241609.4
2007	62810257.8
2008	66168866.8
2009	11263318.8
2010	6684862.3
2011	10874022.5
2012	7469234.7
2013	7620407.2
2014	10856249.7
2015	7640619.6
2016	10151597.4
2017	7610420.7
2018	237893.1
2019	13065197.2
2020	3287638.5
2021	1376243068.9
2022	12514004.4