Year	constant 2015 US$
1997	130487792.7089743
1998	147169502.27109617
1999	128983120.62830111
2000	276459150.84628683
2001	281062752.38248277
2002	287676879.4450578
2003	294781088.6167821
2004	351728164.2722687
2005	357128267.32501686
2006	355890781.5037619
2007	346894114.6701022
2008	323589393.15163034
2009	359094419.7449572
2010	416462134.5275472
2011	405386049.7972328
2012	402619343.235357
2013	402992106.59634036
2014	402402541.9101003
2015	382602034.351798
2016	279658028.2096456
2017	272689175.36897737
2018	340655218.6266589
2019	452657946.9541951
2020	377530168.91994137
2021	392247837.25204694
2022	407794253.98834413
2023	440916844.1815258