Year	TDS, current US$
1971	5015125
1972	10846143
1973	7750762.5
1974	13036997
1975	6315660
1976	8776851.1
1977	14511683.7
1978	27416124.2
1979	26095584.4
1980	26670778.2
1981	20060649.5
1982	21989179.1
1983	21229615.2
1984	21138965.4
1985	33228233.4
1986	49573802.4
1987	48260502.2
1988	21086975.2
1989	5819962.2
1990	1705199
1999	2294484.6
2000	2488962.4
2001	1233626.6
2002	1129124.5
2003	955380.4
2004	1430142.1
2005	1882131.2
2006	2661776.2
2007	2349920.4
2008	548522.2
2009	885384.9
2010	1211590.4
2011	414690.2
2012	113346.7
2013	484786.8
2014	186914.7
2015	172092.3
2016	289132.2
2017	181662.7
2018	328519
2019	3374070.6
2020	1946114.8
2021	5128436.7
2022	19725850.1