Year	TDS, current US$
1972	0
1973	10213356.9
1974	27598613.5
1975	107532906.7
1976	138805300.8
1977	142204838.8
1978	137877475.5
1979	198838505
1980	238734750.7
1981	197348754.3
1982	219719037.1
1983	213712287.9
1984	286251044.4
1985	326759305.6
1986	434216436.5
1987	511529591.7
1988	497637233.1
1989	512226728.3
1990	727008647
1991	595966932.2
1992	528563560.6
1993	516541946.1
1994	534319184.2
1995	751590502
1996	654909091.4
1997	674562310.3
1998	620491471.6
1999	691197510.9
2000	773322606.1
2001	666594362
2002	706732882.9
2003	659152139.2
2004	653283766.1
2005	812105988.3
2006	712935810.5
2007	1008245604.3
2008	940729371.1
2009	1032147833.3
2010	1106277181.1
2011	1528366924.7
2012	1675995387.4
2013	1941041755.6
2014	2032918904.5
2015	1755769691.8
2016	1858017034.6
2017	2277943607.4
2018	3025189205.6
2019	5933889102.9
2020	4047043812
2021	5700007952.6
2022	6804861652.9