Year	current US$
1970	4818578.26696392
1971	5010205.66189699
1972	5689485.50915848
1973	7029997.8387735
1974	7674978.49805675
1975	14841949.3233371
1976	17529765.1238114
1977	20902649.310739
1978	26164254.8422023
1979	32659221.0392369
1980	68263560.6480564
1981	41781771.7550155
1982	49553005.8294347
1983	53144935.7555715
1984	66688162.9189253
1985	90200037.1214874
1986	119126279.6718
1987	138199508.578508
1988	164921207.185811
1989	181515800.178383
1990	197823639.408873
1991	157370559.087451
1992	164805997.871507
1993	170562549.988492
1994	99891084.3655846
1995	146674294.100813
1996	141432244.86879
1997	178770577.604225
1998	189546655.731538
1999	205105566.873619
2000	195784854.303181
2001	185205991.252296
2002	179123296.756915
2003	201703946.371325
2004	223277479.039677
2005	273938340.615299
2006	308448785.03401
2007	392220180.029172
2008	534980492.506089
2009	627247751.84006
2010	696433189.893039
2011	788754822.774287
2012	895851343.732956
2013	926458537.396387
2014	963953707.542191
2015	964080921.395656
2016	962179976.362239
2017	1114260146.30917
2018	1140505226.70119
2019	1261780587.31488
2020	1278594565.72648
2021	1430882252.39969