Year	TDS, current US$
1970	290331084.3
1971	277725651.9
1972	336658436.6
1973	366558362.5
1974	429115630.8
1975	329649590.7
1976	390278659.6
1977	395852172
1978	496080434.3
1979	720430694.3
1980	972551858.6
1981	1144942397.4
1982	1515102955.6
1983	1622630266.3
1984	1647143120.1
1985	1987691476.7
1986	2253726630.4
1987	2817390039.4
1988	3335604505.6
1989	3934900254.3
1990	3890820384.2
1991	3777994797.3
1992	4012168211.1
1993	3722332787.7
1994	5573986681.4
1995	4369326698.9
1996	5426949964.2
1997	4539705265.5
1998	4545362051.6
1999	6639799903.4
2000	5146393921.5
2001	6337507195
2002	6849662623
2003	8629375266.5
2004	7707481067.5
2005	10265223138
2006	9968042414.6
2007	8596840047.3
2008	7969258916
2009	8828657174.9
2010	9779814689.6
2011	10253176811.3
2012	15380701892.5
2013	10075870039.5
2014	15112546372.5
2015	14236818301.3
2016	15829089266.9
2017	22372672296.4
2018	24440094693.1
2019	19227500424.3
2020	21713324821.9
2021	25368652028.5
2022	27180769014.3