Year	TDS, current US$
1970	2339000
1971	2320000
1972	2339000
1973	2345000
1974	2586000
1975	2604000
1976	2768000
1977	2760000
1978	2941000
1979	4415413.5
1980	7032653.8
1981	8141983.1
1982	16225892.6
1983	14444893.2
1984	15423836.3
1985	16136675.5
1986	17549774.1
1987	13127374.1
1988	14609746.5
1989	5918656.6
1990	10964545.6
1991	30090091.9
1992	24980812.4
1993	13401902.4
1994	17686769.9
1995	21195843
1996	23859319.3
1997	37131272.9
1998	43980671.1
1999	70458823.1
2000	87619073
2001	71935766
2002	118611640.6
2003	149553139.1
2004	169470513.3
2005	148279695.8
2006	206574154.1
2007	275260853.4
2008	289719678.1
2009	231047386.2
2010	214918349.3
2011	250191706.3
2012	249508118.5
2013	244117475.9
2014	239083837.5
2015	170258577.5
2016	146077612.2
2017	157266155.5
2018	161160988
2019	162480332.5
2020	130518601.9
2021	132814668.8
2022	106947047.5