Year	current US$
1970	1807127.47638941
1971	1070628.418667
1972	876027.691937418
1973	2342553.58421694
1974	2276749.71937107
1975	285752.265307999
1976	521916.948054565
1977	219300.21782081
1978	36853.9592207342
1979	1144548.10587236
1980	2220920.64705335
1981	435703.557897577
1982	257543.649814318
1983	330116.034416879
1984	233947.961759697
1985	198446.77720722
1986	307480.536469809
1987	514227.908128813
1988	2118507.82286632
1989	46210260.593039
1990	46841419.2503113
1991	83649480.8065078
1992	53157692.8673995
1993	28583106.8575937
1994	62177795.3014186
1995	100563861.682993
1996	24873784.4990804
1997	21402930.6748434
1998	1511818.87042807
1999	18196.6769647008
2000	12984.7460558979
2001	9105.26783341428
2002	2133424.43044309
2003	1557404.69525812
2004	64667807.7563024
2005	86319219.2489849
2006	203307236.136924
2007	201702589.625689
2008	146634933.143537
2009	45548.665643425
2010	99471734.6841266
2011	69535497.7259276
2012	75995390.0160652
2013	22077848.0342536
2014	9851534.47521421
2015	897709.955395859
2016	1504.04327156356
2017	50469719.1884392
2018	122391974.224882
2019	148371295.55022
2020	139124503.995738
2021	291804996.132512