Year	current US$
1990	497790966.534698
1991	520696155.145622
1992	589689328.10121
1993	670252723.322056
1994	754296256.075311
1995	943980970.65476
1996	1069961064.38172
1997	1238230754.27378
1998	1270583303.54648
1999	1270617117.38118
2000	1338292171.7013
2001	1367794147.74435
2002	1442333165.33047
2003	1547178508.72349
2004	1657771417.91783
2005	1783823056.14137
2006	1703667640.05432
2007	1885652859.65672
2008	2016856177.86969
2009	2107213578.20853
2010	2341415424.45976
2011	2464719541.31028
2012	2677616792.68215
2013	3087074367.76623
2014	3428356463.07803
2015	3860130706.32227
2016	4379773127.53617
2017	4995181891.57699
2018	5428999070.72288
2019	5930070584.59125
2020	5605747378.94463
2021	6385430615.03754