Year	TDS, current US$
1970	5890000
1971	6007000
1972	6482000
1973	7964000
1974	8761000
1975	9578000
1976	9855000
1977	10621150.8
1978	10430763.3
1979	11082701.3
1980	12513815.2
1981	10852040.4
1982	12559069.9
1983	13261598.5
1984	14522377.1
1985	17259447.5
1986	23159052.6
1987	28519471.4
1988	31686770.5
1989	33710493.8
1990	29294874.3
1991	42000753.8
1992	41901762.1
1993	42558579.9
1994	53058233.6
1995	64109096.2
1996	72338780
1997	75372411.2
1998	78872172.7
1999	91925964.8
2000	89313808.9
2001	91953560.6
2002	45581719.3
2003	52528361.3
2004	67851606.7
2005	43437160.5
2006	58742842.1
2007	51364992.3
2008	49582316.3
2009	46765013
2010	54129945.2
2011	66732255.4
2012	73571564.8
2013	82412587.9
2014	94317088.8
2015	100822448.6
2016	111393557.1
2017	139992049.2
2018	179135221.1
2019	190518198.3
2020	228522949.9
2021	278799784.8
2022	346986946.7