Year	constant 2015 US$
2002	29531.101309658425
2003	29640.893246253494
2004	31446.57205480175
2005	32507.517490731083
2006	31273.57730152853
2007	31481.05246846497
2008	32128.97222616182
2009	32298.347651081083
2010	32964.24535824099
2011	32841.672288299
2012	33392.68537661988
2013	33822.59301812071
2014	34328.56319904881
2015	34522.377930443276
2016	34509.6006451551
2017	34763.08113729498
2018	34460.44652694522
2019	35341.40513320211
2020	31510.463359253165
2021	31913.28895660863
2022	33298.699299255946