Year	TDS, current US$
1984	11910.7
1985	33737.9
1986	70739.7
1987	275305.1
1988	283811.2
1989	313782.1
1990	659234.6
1991	671337.9
1992	754143.2
1993	741007.8
1994	707109.6
1995	674655.8
1996	766672.2
1997	692183.4
1998	509000
1999	978706.9
2000	1012891.6
2001	1012730.9
2002	1140191.1
2003	1314297.8
2004	1903326.2
2005	1309000
2006	2634361.9
2007	2430059.1
2008	2843950.4
2009	4022761.4
2010	4138528.5
2011	3750025
2012	3462691.3
2013	3218077.6
2014	3065943.5
2015	2488000
2016	2641000
2017	2746000
2018	4598000
2019	3504000
2020	4243000
2021	4382000
2022	4004000