Year	TDS, current US$
1970	4980000
1971	5316032.5
1972	11063283
1973	10433718.8
1974	5472171.2
1975	1460000
1976	7003543.1
1977	21467916.8
1978	4608804.4
1980	253365
1981	1106803.2
1982	3739322
1983	7290497.8
1984	13471476.2
1985	34089586.1
1986	63711642
1987	48006396.1
1988	10737729.2
1989	5079006.7
1990	5320601
1991	182016.8
1999	1323677.5
2000	1430261.8
2001	709323.2
2002	648781.3
2003	548699.6
2004	822023.4
2005	1082022.4
2006	1529808.5
2007	1350303
2008	315565.9
2009	590636.7
2010	807256.6
2011	276286.1
2012	75271.5
2013	323620.4
2014	124609.8
2015	114728.2
2016	191828.1
2017	122033
2018	219484.7
2019	2247998.7
2020	3057782.4
2021	4678273.9
2022	13640813.4