Year	TDS, current US$
1972	3000
1973	7000
1974	16000
1975	107035
1976	159884.2
1977	466530
1978	1725493
1979	5181934.9
1980	7365795.3
1981	9455000.4
1982	13709146.6
1983	19749278.4
1984	32395827.6
1985	35002361.4
1986	43276053.2
1987	84006217.1
1988	84229830.9
1989	39178268.9
1990	54947089.6
1991	90188316.3
1992	63709194.3
1993	59334947.3
1994	61043750
1995	71014822.1
1996	72237152
1997	80615382.5
1998	144346007.3
1999	75342263.3
2000	81842761.3
2001	90495832.2
2002	83470055.3
2003	84060643
2004	102141982.3
2005	84820360.6
2006	90814468.5
2007	99423069.5
2008	115803260.5
2009	123730060.1
2010	137416736.9
2011	156511836.7
2012	161729232.9
2013	172041691.1
2014	263080448.8
2015	272017435.5
2016	121983872.4
2017	78631000
2018	83671000
2019	83913000
2020	86051000
2021	91361000
2022	87817000