Year	TDS, current US$
1976	6715000
1977	1830000
1978	14162600.5
1979	11061399.3
1980	7406253.7
1981	6065623.3
1982	3228217.7
1983	3274774.3
1984	33439344.4
1985	9380194.2
1986	17071737.8
1987	5175118.6
1988	5285522.2
1989	2890752.2
1990	3041119.2
1991	5572725.4
1992	4438538
1993	18341615.4
1994	32420463.8
1995	17103818.1
1996	2065890.1
1997	2215504.9
1998	6295447.6
1999	24693714
2000	20970359.3
2001	4378661.7
2002	3446288.6
2003	7585706.4
2004	62971392.8
2005	62538197.1
2006	569430.4
2007	502614.3
2008	117461
2009	452493.3
2010	618448.1
2011	211665.7
2012	57666.3
2013	247929.1
2014	95736.8
2015	88144.9
2016	147346.2
2017	92911.5
2018	168507.6
2019	1722959.1
2020	547475.4
2021	286337.7
2022	5923108