Year	TDS, current US$
1981	70000
1982	110000
1983	100000
1984	600000
1985	760000
1986	390000
1999	18663.5
2000	20241.7
2001	10038.7
2002	9181.9
2003	7765.4
2004	11633.6
2005	15313.4
2006	21650.6
2007	19110.1
2008	4466.1
2009	45494.9
2010	38990.2
2011	13344.5
2012	3635.5
2013	15630.8
2014	582019
2015	1081523.3
2016	1367817.6
2017	2363002.5
2018	3516002.8
2019	2629343.4
2020	1537946.2
2021	1256467
2022	855143.7