Year	current US$
1970	36899999.14169312
1992	135630001.06811532
1993	124260000.2288819
1994	128230003.35693361
1995	145370002.7465821
1996	118559999.4659424
1997	138479999.5422364
1998	144000000
1999	145000000
2000	149150001.525879
2001	148339998.2452392
2002	154630002.9754639
2003	166579998.0163575
2004	175329999.923706
2005	171379997.253418
2006	171279998.77929688
2007	181969999.3133545
2008	217980003.3569333
2009	227160007.4768068
2010	248950004.57763636
2011	261749999.9999999
2012	299102401.7333989
2013	229199172.9736324
2014	295676027.297974
2015	318569263.45825255
2016	293305965.42358446
2017	371171543.12133753
2018	320982028.96118194
2019	327738315.5822754
2020	325080364.2272957
2021	306613315.58227515
2022	368815731.0485836