Year	current US$
1990	239825921.977416
1991	240287790.34203
1992	234459683.039089
1993	221143811.320303
1994	206612107.219564
1995	187436650.862505
1996	165756827.425461
1997	156138564.345731
1998	144252996.210791
1999	140249386.111346
2000	150746764.694321
2001	140393263.387514
2002	86476346.4899789
2003	102862852.95023
2004	121937206.836034
2005	158620739.080897
2006	200006703.157223
2007	249132892.827797
2008	332200137.554823
2009	257816698.986094
2010	301262631.364162
2011	348868199.931745
2012	352706136.601938
2013	336825930.850073
2014	309203641.069249
2015	245481947.299812
2016	265876731.54501
2017	260763716.035436
2018	282276252.281112
2019	303482148.248836
2020	294738858.99028
2021	203095162.514924