Year	current US$
1990	1295590363.49165
1991	1801611912.901
1992	1967218452.42668
1993	2231552498.73453
1994	2573777809.5672
1995	2841965426.24091
1996	3108807546.2224
1997	3533288637.43302
1998	3789030416.14337
1999	2870760312.10122
2000	2380107314.7373
2001	2216927890.37433
2002	1852747787.64252
2003	1554553461.36832
2004	2083589334.78468
2005	2949904023.27276
2006	3150987423.62091
2007	4017186812.37753
2008	4966862544.05807
2009	5520558737.26461
2010	6941625198.52234
2011	8249881753.29493
2012	5682060291.89854
2013	7348555747.82265
2014	6464443792.98109
2015	6958271829.5616
2016	9044737223.71889
2017	8720088225.89757
2018	7392076776.52087
2019	8063827118.6116
2020	7081359329.62384
2021	7562679861.82882