Year	TDS, current US$
1970	79924877.6
1971	89433065.9
1972	106547807.1
1973	69020930.19999999
1974	81870799.9
1975	108917305.69999999
1976	135259414.6
1977	177730591.6
1978	237288811.3
1979	299892154.79999995
1980	371089953.4
1981	432577706.2
1982	542293071.6
1983	673409060.5
1984	715952144.3
1985	845477520.2
1986	1193188007.3000002
1987	1558627664
1988	2078526583.9
1989	1950136145.1
1990	2217809175.2
1991	2253190066.7000003
1992	2190781727.4
1993	2135454859.1000001
1994	2500223123.9
1995	2908014014.7000003
1996	2637796441.6000004
1997	2513165499.3999996
1998	2714940114
1999	2619568055.2999997
2000	3140154386.4000006
2001	3716643212.1
2002	2943978845.9999995
2003	3171410660.2
2004	3407315903.3
2005	4641311768.200001
2006	4537882438.900001
2007	4665414992.799999
2008	4908832650.1
2009	4566253142.6
2010	4190302556
2011	5407219426
2012	6734014250
2013	8323667630.1
2014	6882578347.099999
2015	6657784742.3
2016	7644822606.2
2017	9462970369.2
2018	10079022011.7
2019	9662486806.500002
2020	9709066704.3
2021	9078312461.800001
2022	8793944363.599998