Year	constant 2015 US$
2006	1241.328474120492
2007	1197.4721840751256
2008	1174.320537077195
2009	1087.3836063515344
2010	1047.629683613392
2011	1096.6733203011872
2012	1094.8757125693419
2013	1116.2201633491377
2014	1148.4340043855655
2015	1258.8170007924507
2016	1302.6107174837748
2017	1335.8086212335575
2018	1225.5614860796647
2019	1327.3400307233949
2020	1310.1491874657315
2021	1367.088511497942