Year	TDS, current US$
1977	934060
1980	70000
1981	90000
1982	510000
1983	580000
1984	560000
1985	1140000
1986	1280000
1987	463678.1
1988	1381871.1
1989	957601.7
1990	24437.6
1991	38319.3
1992	26763.6
1993	444052.8
1994	441075.3
1995	1166755.6
1996	1138199.5
1997	1082982.8
1998	682459.1
1999	764336.5
2000	567987.6
2001	339962.2
2002	1795091.8
2003	5038526.1
2004	5509996.9
2005	3252423.7
2006	3936678.8
2007	3422771.4
2008	2127202.3
2009	1728817.9
2010	8247569.8
2011	22946.6
2012	6251.5
2013	26877.9
2014	10637.4
2015	9793.9
2016	1021693
2017	2017704.5
2018	2068820
2019	2187204.6
2020	3461771.9
2021	2883321.1
2022	3337603.2