Year	TDS, current US$
1970	378000
1971	322000
1972	459000
1973	525000
1974	565000
1975	758000
1976	982000
1977	1409000
1978	1640000
1979	2238000
1980	2365000
1981	2288800
1982	2922575.6
1983	2931695.7
1984	4631352.4
1985	5435199.7
1986	6903497.3
1987	8939596.3
1988	9753826.8
1989	12256809.7
1990	12146024.7
1991	12791197.5
1992	815000
1993	436000
1994	475000
1995	59812000
1996	19231000
1997	23918000
1998	23614000
1999	25545000
2000	25026928.7
2001	14343000
2002	7448000
2003	35290432.2
2004	82621769
2005	43963662.4
2006	46331144
2007	35236336.3
2008	48719068.3
2009	33249057.9
2010	47779091.4
2011	2517556.8
2012	2384000
2013	813545.7
2014	677420
2015	780890.8
2016	1744539.2
2017	2496570
2018	3214648
2019	3406000
2020	4355000
2021	7803889.2
2022	5797000