Year	TDS, current US$
1981	274000
1982	260000
1983	968000
1984	1487000
1985	1475000
1986	1559766.3
1987	1503012.7
1988	3088767.5
1989	235286391
1990	174126737.1
1991	161124243.3
1992	232495672.9
1993	417970132.4
1994	307065389.6
1995	364866182.3
1996	396891472.9
1997	883976599.6
1998	1095668940.6
1999	1414888366.2
2000	1306149754.7
2001	1217829483.9
2002	1210969494.7
2003	837275929.7
2004	816587302.9
2005	947722826.3
2006	967302850.4
2007	1251493026.3
2008	1409602374
2009	1490800545.2
2010	1883944042.6
2011	4186161850
2012	4501243161
2013	4556834780.2
2014	6844250852.3
2015	6825126949.5
2016	7719553295.4
2017	14390394668.5
2018	18898201021.3
2019	17249257565.3
2020	17112140250.2
2021	20701274007.3
2022	26216121152.9