Year	constant 2010 US$
2006	1570.90382261247
2007	1611.92778499446
2008	1217.9945121957
2009	1074.65274465784
2010	1204.50228872334
2011	1295.00791837217
2012	1339.39210703292
2013	1392.47884214239
2014	1428.95670206643
2015	1548.19133719353
2016	1595.28661079551
2017	1614.70403331566
2018	1597.35720809474