Year	TDS, current US$
1971	366733.7
1972	1412000
1973	4835605.8
1974	4143955.1
1975	5520500
1976	16438356.3
1977	22083194.9
1978	34530556.1
1979	58138697.3
1980	72732187.4
1981	116085569.4
1982	101813148.5
1983	84471592.3
1984	120081537.4
1985	131381263.4
1986	172747399
1987	268466916.7
1988	310275303.4
1989	261590688.3
1990	169074020.2
1991	201207312.5
1992	132996836.9
1993	119569077.6
1994	105864386.1
1995	101911043.4
1996	86744748.6
1997	97915378
1998	196523258.9
1999	179904300.4
2000	244950795.3
2001	259780612.6
2002	172949177.7
2003	177672737.8
2004	225391716.2
2005	213415033.9
2006	236578153.1
2007	273119667.1
2008	284433096.3
2009	263560168.9
2010	256957142.9
2011	275018659.2
2012	254823471.9
2013	271132600.7
2014	363274731.1
2015	358047198.9
2016	139341048.8
2017	99011345.5
2018	111299430.7
2019	114724289.6
2020	134552314
2021	123408118.3
2022	114796222.6