Year	current US$
1990	457499.557203151
1991	417466.622815288
1992	474917.604447344
1993	481355.28577811
1994	496161.160399556
1995	605167.511640212
1996	560506.335404835
1997	498948.971829902
1998	499804.840159482
1999	463730.66110949
2000	656935.678240475
2001	627652.668599023
2002	731244.938549704
2003	835455.961857857
2004	550365.600112985
2005	835921.125844382
2006	1044956.32252753
2007	1123610.84434165
2008	1726004.71823249
2009	1363933.54093704
2010	1425360.10119316
2011	1596402.44379288
2012	1742656.48407382
2013	1817987.78318662
2014	1699112.38581101
2015	1417048.87413329
2016	1475820.82184472
2017	1836398.79757299
2018	1987353.21572697
2019	1642175.16210601
2020	1658301.70820965
2021	1754733.00317922