Year	current US$
1990	969407.919249655
1991	1152832.81582056
1992	1071675.28959784
1993	1261982.11504153
1994	1317931.72290386
1995	1528714.12251783
1996	1273384.18849357
1997	1490049.04244738
1998	1540723.48853655
1999	1952610.82581629
2000	1856161.1257993
2001	1746615.68242042
2002	2015276.22324025
2003	2521545.88921085
2004	2868116.55809166
2005	3024611.89944797
2006	3678568.47088466
2007	3347922.13434937
2008	3488906.0303698
2009	3866446.7943084
2010	3429389.03464468
2011	3281122.55944471
2012	3417705.32091033
2013	3879046.23928553
2014	3703783.24519181
2015	4172738.18116446
2016	5386733.35657269
2017	6735076.97537214
2018	6268599.16278742
2019	6524627.17833836
2020	6981566.80556599
2021	7463573.00345648