Year	current US$
1990	848231.929343448
1991	896647.745638217
1992	937715.878398108
1993	981541.645032299
1994	1025058.00670301
1995	1222971.29801426
1996	1273384.18849357
1997	1324488.03773101
1998	1540723.48853655
1999	1775100.75074208
2000	1856161.1257993
2001	2134752.50073607
2002	2216803.80051935
2003	2941803.61569174
2004	3309365.51222569
2005	3489937.07374311
2006	4169044.14519164
2007	2832857.27916179
2008	2952151.3487545
2009	3866446.7943084
2010	4858301.29210666
2011	4474258.23764167
2012	4971207.65532776
2013	6141823.27241281
2014	5724028.74288429
2015	6606835.51827981
2016	7900541.89955739
2017	10476786.034429
2018	11753624.1599874
2019	13049254.3566768
2020	14249104.8790656
2021	16419995.6788876