Year	TDS, current US$
1978	727378.7
1979	587350.4
1980	535822.5
1981	2537227.8
1982	4068076.8
1983	7420239.1
1984	19181334.6
1985	10276647.9
1986	11852831.3
1987	7323683.7
1988	9710342.3
1989	9707915.7
1990	8827405
1991	7519923.1
1992	7118295.8
1993	8362426.9
1994	9459212.1
1995	10832002.1
1996	11710497.6
1997	28625102
1998	15938278.9
1999	17695891.1
2000	19743654.2
2001	21814003.6
2002	21616999.9
2003	21773430.4
2004	29206950.9
2005	31323250.6
2006	45189004.7
2007	73989239.2
2008	92780764.4
2009	98273322.5
2010	73279054.9
2011	83536514.8
2012	83476936.9
2013	120790993.4
2014	177670625.2
2015	138265877.2
2016	135197597.4
2017	161571436.4
2018	439305372.4
2019	458109301
2020	314504471.4
2021	802405872.2
2022	694584358.4