Year	TDS, current US$
1981	2359.7
1982	3312.8
1983	6414.8
1984	32808.6
1985	28547.2
1986	153340.4
1987	515456.5
1988	1312033.6
1989	6518755.4
1990	5209460.3
1991	7242215.6
1992	5892385.8
1993	7124086
1994	7528089.8
1995	9802440.4
1996	6921506.6
1997	7202999.1
1998	9175546.3
1999	7346713.7
2000	7036682.6
2001	6471943.8
2002	6611786.9
2003	7339387.3
2004	12186115.5
2005	7100275
2006	10663858.7
2007	32134603.7
2008	81572569.6
2009	75516276.7
2010	87491325.5
2011	85420691.9
2012	139593041.4
2013	81020805.9
2014	82902104.9
2015	128945853.4
2016	110587796.2
2017	82488712.2
2018	87251066.6
2019	61562913.6
2020	57861851.8
2021	118437762.9
2022	118548124