Year	TDS, current US$
1970	944000
1971	2075000
1972	3522000
1973	6568000
1974	7655000
1975	7812653.2
1976	7885793.6
1977	8590944.3
1978	9848058.7
1979	9418000
1980	21765899.2
1981	11115961
1982	11621657.2
1983	12886996.5
1984	15318675.1
1985	14958145.3
1986	23815503.5
1987	25532710.1
1988	31950539.4
1989	34448741
1990	32889860.8
1991	31196945.8
1992	45397228
1993	28307626.9
1994	31456988.2
1995	49329769.4
1996	58883708.1
1997	57371283.7
1998	85779712.3
1999	72715316.9
2000	74898328.1
2001	50751993.3
2002	53010925.2
2003	53427554.3
2004	95834395.4
2005	62680574.9
2006	59952364.2
2007	56220575.6
2008	70232116.8
2009	67480406.7
2010	33200175.1
2011	162249248.4
2012	74788028.6
2013	26676676.1
2014	39075130.4
2015	31732087.6
2016	33623358.8
2017	36391537.6
2018	39023179.9
2019	39146762.5
2020	40393905.7
2021	50280512.4
2022	63787575.3