Year	current US$
1990	369829121.193743
1991	375311127.817139
1992	406164934.75758
1993	453191799.534913
1994	521900962.26993
1995	595739893.545199
1996	714686875.792015
1997	849162393.190292
1998	890366984.875401
1999	966187338.628916
2000	935876439.628008
2001	939873305.551346
2002	989903644.579425
2003	1054846736.59576
2004	1212772126.78743
2005	1302211830.10528
2006	1401534569.13541
2007	1662887224.01922
2008	1824697863.48133
2009	1807563784.36167
2010	1993332420.94167
2011	2280976795.32346
2012	2436202619.82435
2013	2683007042.14237
2014	2577833070.41775
2015	2859369019.28487
2016	3105990253.2635
2017	3257906260.48839
2018	3393271184.0647
2019	3725970103.31443
2020	3617450841.19984
2021	4302520045.942