Year	current US$
1970	7960570.29300331
1971	8368702.74805298
1972	10025149.2893446
1973	10118029.480567
1974	11233190.3697767
1975	14846417.6482144
1976	18420012.8345743
1977	17776586.4806901
1978	23431730.3327766
1979	31306892.4904664
1980	32718865.9960545
1981	28256552.5925408
1982	27907006.5156998
1983	27033293.4226618
1984	23278877.940995
1985	26295482.8102916
1986	38587165.9908192
1987	42717286.7694942
1988	36441167.9338669
1989	57281128.5787862
1990	84073752.3394557
1991	84939894.9385485
1992	90887833.0318113
1993	86435267.1964197
1994	54549777.7230631
1995	51146585.8412158
1996	33714858.2571405
1997	56245949.7246214
1998	66668022.5880882
1999	89904360.6220434
2000	86550191.5594817
2001	101373192.794667
2002	124134763.479875
2003	174781869.314525
2004	216245121.554599
2005	259714556.484429
2006	275516707.015506
2007	201194096.734339
2008	267450040.479978
2009	283298739.649464
2010	316783607.532807
2011	478776255.620642
2012	443214555.155698
2013	563778525.662989
2014	574846323.406399
2015	486733714.505314
2016	528480500.184271
2017	585183172.948834
2018	663220026.591218
2019	660570964.23158
2020	718254102.921111
2021	806740752.682602