Year	current US$
1990	424009324.009324
1991	266666666.666666
1992	219687500
1993	206363636.363636
1994	170643356.643356
1995	169094650.205761
1996	231382043.972351
1997	214950309.66441
1998	236025771.905156
1999	162257043.652065
2000	180714157.837661
2001	184120470.74703
2002	197257535.578671
2003	209247286.20912
2004	234001433.895551
2005	246141354.439454
2006	268508625.777964
2007	339696057.754922
2008	533832222.361967
2009	470672965.986933
2010	489749653.535461
2011	547435305.6417
2012	727106979.11902
2013	1013037257.86106
2014	1225062017.62773
2015	1151060855.91378
2016	787001477.527423
2017	885802572.215599
2018	971000997.96195
2019	1177094482.96515
2020	1044137501.45195
2021	1159307225.82822