Year	TDS, current US$
1985	833009.4
1986	951778.1
1987	1164467.2
1988	1287744.2
1989	1313733.8
1990	1925851.1
1991	1681321.5
1992	1608523.4
1993	1728142.2
1994	2725154.9
1995	3224913.8
1996	3446510.3
1997	4113949
1998	3680525.3
1999	4519538.5
2000	4942815.9
2001	2847557.8
2002	3585099.5
2003	3745141.4
2004	4442735.2
2005	5184852.6
2006	4403048.6
2007	5028254.9
2008	5534787.7
2009	3862318.8
2010	5043100
2011	6008057.3
2012	6379825
2013	6595996.8
2014	6544327
2015	6434136.3
2016	6189049.6
2017	5579076.1
2018	9513697.2
2019	5561316.8
2020	6022033
2021	4801977.2
2022	11025933.6