Year	TDS, current US$
1973	6000
1974	28000
1975	29000
1976	222000
1977	187000
1978	377000
1979	336000
1980	421000
1981	507000
1982	643000
1983	1611000
1984	1310631.7
1985	1369000
1986	2036987.6
1987	2181763.8
1988	2516577.7
1989	3143998.2
1990	4598077.8
1991	5118659
1992	6112312.9
1993	7148904.7
1994	7399899
1995	8825838.5
1996	8485992.4
1997	9936840.6
1998	11923348.5
1999	14671210.6
2000	18320030
2001	20630155.9
2002	22463807.2
2003	27685686.5
2004	34095454.5
2005	36892610.9
2006	40445576.9
2007	47576470
2008	59657218.7
2009	65585884.5
2010	70997312.3
2011	89751389.9
2012	91803580.3
2013	90406265.4
2014	92472798.4
2015	86197360.2
2016	89091316.7
2017	90996530.7
2018	97671220.7
2019	98207026.5
2020	100533893.9
2021	110743378.9
2022	111316628.8