Year	TDS, current US$
1978	21290.7
1979	34885.4
1980	52063.4
1981	70789.8
1982	69568.5
1983	307908
1984	1133945.9
1985	1152353.8
1986	3028017
1987	3359701.1
1988	3132061.7
1989	1880591.3
1990	2024245
1991	160120
1992	109871.8
1993	177341.8
1994	1023924.7
1995	2245511.4
1996	2502877.4
1997	4783288.9
1998	5773088.2
1999	9902036.6
2000	11507462
2001	10407302.9
2002	10409031.8
2003	10486413.8
2004	8201279.1
2005	8074869.1
2006	586404.3
2007	525345
2008	186810.2
2009	366043.9
2010	296159.1
2011	377305.9
2012	701141.1
2013	1053031.8
2014	7569286.1
2015	8459107.5
2016	9724849.4
2017	16606193
2018	21248947.9
2019	21282067.7
2020	25385862.8
2021	14801238.3
2022	14774313.8