Year	current US$
1990	1871283458.32677
1991	1873177085.51465
1992	1842786643.54489
1993	1501817088.42019
1994	1483276125.88506
1995	1688856037.10663
1996	1667186063.90969
1997	1695110730.13254
1998	1679612095.59968
1999	1648297394.39178
2000	1514756439.77852
2001	1428340579.10458
2002	1535700162.70389
2003	1775407583.36514
2004	1959764258.38985
2005	1975685073.5437
2006	2073396102.30371
2007	2297960306.10413
2008	2182702874.88697
2009	1803738448.66308
2010	1765660452.31763
2011	1753565893.79822
2012	1642461775.08835
2013	1596082042.14093
2014	1619031774.65427
2015	1496690731.58491
2016	1351025129.97751
2017	1289338850.37298
2018	1394769917.90655
2019	1361952927.83638
2020	1424703903.69504
2021	1513724671.45148