Year	TDS, current US$
1999	316131.9
2000	342865.7
2001	170040.6
2002	148131.2
2003	131535.6
2004	197057.4
2005	268108.7
2006	358686.6
2007	313587.5
2008	77636.6
2009	21596.1
2010	29516.6
2011	10102.2
2012	2752.2
2013	11832.9
2014	4558.9
2015	4197.4
2016	6950.3
2017	4160.2
2018	8496.2
2019	82901
2020	26468.3
2021	19943.9
2022	400137.7