Year	current US$
1980	5677110.71480333
1981	8984888.05557121
1982	11738012.022951
1983	6099081.32917411
1984	4252987.0501002
1985	7955091.97597677
1986	4428391.63641439
1987	917456.666957239
1988	3471208.05798111
1989	5279161.45842934
1990	5176274.67777883
1991	7377194.68914844
1992	3786579.38648474
1993	638305.62697134
1994	610133.190080122
1995	3352846.58991026
1996	1520281.28335238
1997	817995.959856906
1998	1691579.72977957
1999	1296554.14067852
2000	3035507.99585697
2001	5431940.92138912
2002	4171465.85077002
2003	4436843.26185851
2004	15588232.8464571
2005	39947148.1583716
2006	59658501.8658268
2007	90196685.7104743
2008	301870651.966974
2009	231188668.602463
2010	615716099.874742
2011	1203798316.45532
2012	678220598.071618
2013	548404213.853852
2014	591545752.850165
2015	262325225.377011
2016	312119940.436979
2017	500224978.231726
2018	621378096.756884
2019	510788477.253711
2020	278534323.775493
2021	442446062.569062