Year	TDS, current US$
1981	306715.9
1982	1456523.5
1983	2954345.3
1984	5241449.1
1985	5140433.2
1986	4906991.1
1987	8274717.4
1988	8240349.2
1989	6586974.7
1990	5741384.1
1991	7955477.4
1992	10629069.4
1993	6665806.9
1994	9373993
1995	9757449.6
1996	8024308.2
1997	14679032.2
1998	19654039.7
1999	20356517.2
2000	16162046.4
2001	13707328.9
2002	22909060.9
2003	19044407.8
2004	24048984.7
2005	35719852.6
2006	31581965.9
2007	29489808
2008	31356045.1
2009	32919060.9
2010	35017011
2011	37796716.4
2012	35646171.7
2013	38948224.1
2014	43201129.5
2015	41864989.5
2016	43713464.2
2017	50702791.6
2018	55874782.6
2019	60723381.2
2020	59316134.9
2021	54487327.3
2022	97538377.5