Year	current US$
1988	39999.9991059304
1989	1929999.9494105536
1990	9089999.768882986
1991	5110000.04224479
1992	11569999.985396856
1993	22909999.582916453
1994	13119999.816641215
1995	14119999.7048825
1996	13460000.051185489
1997	10430000.003427261
1998	3020000.007003544
1999	1669999.9645352352
2000	11469999.644905334
2001	1439999.988302588
2002	2549999.9672174393
2003	15160000.044852471
2004	21930000.200867645
2005	33309999.831020802
2006	38320000.29459596
2007	51229999.63350593
2008	82680000.27723612
2009	69259999.72037973
2010	106619999.08834699
2011	129950000.82813197
2012	226390000.14215702
2013	250590000.24199486
2014	313139993.91160905
2015	341000004.77395964
2016	387279998.3918667
2017	381410001.2369453
2018	399900004.35523677
2019	406230001.7140806
2020	400490004.517138
2021	473349999.83385205
2022	514739993.6039003