Year	TDS, current US$
1979	36177.5
1980	67682.4
1981	77868.8
1982	72881.3
1983	70562.3
1984	1170855.5
1985	2229509.8
1986	3025669.7
1987	3367560.1
1988	3425104.4
1989	1875463.6
1990	571567.5
1991	171068.4
1992	129592.4
1993	166170.7
1994	28641.3
1995	2060408.5
1996	3308618.1
1997	5183731.1
1998	6680772.3
1999	8798059.6
2000	8508044.7
2001	9803857.1
2002	9563483.3
2003	9438712.6
2004	8333178.2
2005	6638894.6
2006	3973584.3
2007	3619279.4
2008	4533887.9
2009	5862148.7
2010	5781250.2
2011	5085409.4
2012	3492613.8
2013	1476975.2
2014	37990.8
2015	34978.1
2016	59772.5
2017	37441.9
2018	67969.4
2019	694986.7
2020	221497.7
2021	115389.8
2022	2384767