Year	TDS, current US$
1970	7350000
1971	9991000
1972	9207000
1973	7250000
1977	130000
1978	1060000
1979	1490000
1980	32490000
1987	13357595.4
1988	16603959.8
1989	22751693.6
1990	134574955.1
1991	153180153
1992	48564733.8
1993	22250118.1
1994	15261490.5
1995	32367227.2
1996	58707282.9
1997	60049816.3
1998	57090483.2
1999	56191326.7
2000	45173476.1
2001	33260329.5
2002	889182.3
2003	752016
2004	1126617.9
2005	1482957.6
2006	2096667.4
2007	1850647.5
2008	432496.5
2009	983544.1
2010	1344265.2
2011	460079
2012	125344.1
2013	1171099.7
2014	7510020.4
2015	12226950.2
2016	54501414.6
2017	346042554.9
2018	562874801.7
2019	427597816.8
2020	221216278.5
2021	135117213.6
2022	195312681