Year	current US$
1988	620000.0122189522
1989	319999.9947100877
1990	129999.9970942736
1991	4760000.014677643
1992	5180000.014603137
1993	5939999.965950845
1994	15340000.236406924
1995	14099999.779835345
1996	9199999.984353779
1997	24760000.72248284
1998	31830000.27388336
1999	27529999.76277354
2000	21149999.67440963
2001	8189999.978989366
2002	45599999.08320609
2003	56760000.43936069
2004	85860000.32536677
2005	111580001.52185558
2006	91950000.56549913
2007	120419998.20061032
2008	143469999.93920323
2009	161019998.3939528
2010	333240000.28893363
2011	346369995.38354564
2012	416610000.63456583
2013	515140003.51354444
2014	541969995.8264829
2015	579549996.7783691
2016	577500000.8922071
2017	587409998.713061
2018	641630000.7011739
2019	721599991.6084111
2020	742229997.2996113
2021	844119998.8313018
2022	802779987.4432391