Year	current US$
1990	2878666746.36396
1991	2282542555.45083
1992	2127690227.66255
1993	2227415168.48253
1994	2844751861.05467
1995	3839107797.25449
1996	4057689919.67742
1997	3914138801.30499
1998	3663738715.81823
1999	2454656875.58039
2000	2458945010.4143
2001	1983868176.79667
2002	1673271413.34978
2003	1735685561.53675
2004	1887348209.51461
2005	2350887745.06728
2006	2815366479.89024
2007	3272087376.88333
2008	3833152079.45924
2009	3805764013.30274
2010	4622364379.23041
2011	5181353267.88382
2012	4725181338.39082
2013	4477251706.5282
2014	4212600143.96514
2015	3115926182.53021
2016	3169743496.05943
2017	3489210973.02746
2018	3170090672.26292
2019	3055120663.38909
2020	2447643182.28732
2021	2586087710.72061