Year	current US$
1990	1651878996.82275
1991	1565382658.83207
1992	760847259.841346
1993	394969015.135197
1994	805717050.72765
1995	886123582.965557
1996	1369606643.12302
1997	1613764108.31667
1998	1925124106.81825
1999	2055284765.25892
2000	1624278703.79674
2001	1948065863.65554
2002	1472002995.59798
2003	2163462714.08726
2004	2698966519.84548
2005	2139061015.10879
2006	2496099387.36244
2007	2078560152.66989
2008	1589875761.18542
2009	2154729421.52763
2010	2814770315.05651
2011	194892149.83455
2012	-140987832.196779
2013	-479692281.724978
2014	2163614118.71529
2015	644878106.343228
2016	290530380.549454
2017	-39680342.2615442
2018	571753911.336836
2019	667696722.030962
2020	-1546266238.07319
2021	-460197234.372751