Year	TDS, current US$
1979	1383000
1982	60000
1983	190000
1984	435000
1985	626000
1986	1585000
1987	5336979.2
1988	518873.8
1989	338429.5
1990	973429.7
1991	680168.1
1999	34540.1
2000	37461.1
2001	18578.4
2002	16992.7
2003	14371.4
2004	21530.2
2005	28340
2006	40068.3
2007	35366.7
2008	8265.1
2009	35726.2
2010	48829.1
2011	16711.9
2012	4553
2013	19575.1
2014	1588015.3
2015	2917174.8
2016	3865752.8
2017	3852359.4
2018	3490514.3
2019	2174769.5
2020	270255
2021	528514
2022	994322