Year	current US$
1990	725257453.122935
1991	725438263.598464
1992	733473064.40387
1993	724581758.006216
1994	731581939.55109
1995	784368906.229441
1996	834211451.849442
1997	854126729.64007
1998	732810723.414279
1999	848498597.684224
2000	1059461316.24956
2001	1008094899.74997
2002	1003117206.21258
2003	993858784.119406
2004	1076108771.09585
2005	1267351437.97356
2006	1353282776.9127
2007	1484440093.35827
2008	1616723597.35076
2009	1367521161.47126
2010	1675955424.47844
2011	2046663189.72057
2012	2384089888.19749
2013	2581451911.85388
2014	2496852052.68432
2015	2211438661.5008
2016	2109651325.93319
2017	2240789429.09308
2018	2535716903.47353
2019	2528733159.39396
2020	2299522922.36918
2021	2674100971.91764