Year	TDS, current US$
1976	20000
1977	1237008.7
1978	973639.7
1979	2465131.3
1980	4625552.8
1981	4800202.9
1982	5673264.1
1983	5092458.1
1984	7207327.8
1985	9405938.2
1986	8206311.4
1987	10748504
1988	9706335.8
1989	11192600.2
1990	8425719.7
1991	22993097
1992	6646481.2
1993	3791907
1994	7681896.1
1995	15505975.7
1996	11113725.6
1997	8718920.1
1998	7059958.7
1999	8518869
2000	5232987.6
2001	4822024.9
2002	3700193.9
2003	7904340.2
2004	9921720.2
2005	6370606.7
2006	9829776.2
2007	10555941.6
2008	14984952.9
2009	21182967.9
2010	17987840.2
2011	5910716
2012	6215813.8
2013	2434260.5
2014	4207303.9
2015	5122712.8
2016	6407250.2
2017	14961626.7
2018	17706423.2
2019	19641671.8
2020	26922945.2
2021	47205021.7
2022	67989999