Year	current US$
1990	1213084416.93225
1991	1387131569.85857
1992	1285572732.69829
1993	1418857160.1224
1994	806759221.433648
1995	843662984.179646
1996	1294379517.38541
1997	1428065453.89825
1998	1542151136.14515
1999	1762903638.524
2000	1845264740.10352
2001	2086366515.82585
2002	1335471020.16673
2003	1600507766.3327
2004	1749808496.8511
2005	2908745076.64444
2006	2628814714.24367
2007	2973439770.60183
2008	2420877306.50404
2009	1345802035.30316
2010	2435650214.00597
2011	4192167353.50468
2012	3569333336.93507
2013	3187005575.3816
2014	3959097564.23289
2015	2646247724.8923
2016	2463988102.51999
2017	2795188006.48682
2018	2107056859.91605
2019	2006342856.66379
2020	1311346912.10891
2021	1498430035.83611