Year	current US$
1988	840000.0073015688
1989	1110000.010579824
1990	1439999.9789893618
1991	11939999.982714653
1992	12760000.249370929
1993	11469999.961554997
1994	17210000.244900584
1995	21920000.368729237
1996	63320001.17748974
1997	63000001.31502757
1998	66029999.74973504
1999	53380000.16100706
2000	44260000.454261914
2001	90830001.67831777
2002	121759998.79650775
2003	97779999.75718555
2004	117249999.70011412
2005	106399999.32982026
2006	92569999.07270092
2007	162379998.68765473
2008	183550000.00819558
2009	191079995.6601112
2010	269640005.5736302
2011	346440003.83280206
2012	398530009.9663439
2013	431660000.1361222
2014	413889999.65600693
2015	514010000.06124336
2016	480820004.2080138
2017	504869996.67808414
2018	506309994.93598926
2019	493659996.36054045
2020	598870007.2765357
2021	573389998.0038407
2022	631869998.7828732