Year	current US$
1980	0
1981	0
1982	0
1983	158545.53815081
1984	139437.610707751
1985	405452.98980149
1986	341079.645139524
1987	255336.083446356
1988	465453.957638594
1989	636916.145316529
1990	639773.025695119
1991	633586.828454167
1992	576179.699810138
1993	415482.277121138
1994	428441.859106485
1995	591771.67923215
1996	557957.362937086
1997	463934.230258402
1998	347619.378235092
1999	262611.653797231
2000	1604368.39685646
2001	1340082.81299334
2002	1326202.64171149
2003	1558385.70118579
2004	2602206.03721138
2005	3167518.27931589
2006	3884901.18228551
2007	4709939.0654606
2008	7977970.27415165
2009	3239540.42122458
2010	5957076.93244642
2011	9265204.89214833
2012	6391324.98316947
2013	5751188.32142684
2014	4369967.17216122
2015	2220449.23820754
2016	2209612.98812238
2017	1273824.81731275
2018	1246282.21730716
2019	886811.659306589
2020	728979.894109579
2021	1483785.66907028