Year	current US$
1990	1494463483.51325
1991	1503037806.75983
1992	1402421075.84997
1993	1356069892.72962
1994	1299627115.64131
1995	1275253321.00437
1996	1178039547.38011
1997	1117867903.84497
1998	1043240993.23797
1999	1181862079.84408
2000	1333094920.54906
2001	1443674895.72506
2002	1434876588.06438
2003	1528477055.78574
2004	1639680227.23614
2005	1805227960.07467
2006	1935907950.22404
2007	1690185604.16492
2008	1954592630.00335
2009	1528903542.72506
2010	1475208852.18495
2011	1106633114.62189
2012	1195575453.60678
2013	893150389.430418
2014	1051537724.35134
2015	872797769.000226
2016	1077346628.50463
2017	2031374003.49768
2018	1979701969.52198
2019	2285250757.62656
2020	2421899012.67752
2021	2646135761.53775