Year	TDS, current US$
1978	4000
1979	13000
1980	30198.8
1981	216346.7
1982	1770951.7
1983	64923.6
1984	369453.5
1985	1015705.3
1986	1886600.9
1987	4085039.1
1988	3517778.5
1989	5821588.8
1990	4040373.4
1991	20259611.8
1992	5219708
1993	2475863.2
1994	4755506.9
1995	12037431.3
1996	6711407.2
1997	6135780.8
1998	3362478.4
1999	5202097.9
2000	3996000
2001	3833062.7
2002	1583102.1
2003	2663814.1
2004	4311723.3
2005	3018183
2006	5793097.4
2007	6933170.2
2008	7502684
2009	10640485
2010	9143839.3
2011	5042315.5
2012	5330476.4
2013	1544264.3
2014	3134792
2015	3096044.3
2016	3204984.9
2017	7994627.1
2018	10862988.7
2019	11576233.1
2020	15414196.7
2021	29335022.1
2022	43097717.3