Year	TDS, current US$
1983	220000
1984	250000
1985	430000
1986	2150000
1987	2759801.3
1988	3615985.4
1989	4712374.7
1990	3239335
1991	424249.8
1999	944482.9
2000	1024353.4
2001	508017.3
2002	442560.2
2003	392978.6
2004	588733.2
2005	801007.7
2006	1071620.5
2007	936881.1
2008	231948.8
2009	133932.8
2010	179740.6
2011	135824.9
2012	2783684.1
2013	3641618.6
2014	910259.5
2015	12592.1
2016	20850.9
2017	13867.4
2018	24072.5
2019	245939.6
2020	78011.8
2021	32765
2022	681170.8