Year	constant 2015 US$
2008	44678.66958472624
2009	42740.25394247953
2010	42510.34665292494
2011	44108.580354904094
2012	47197.67409003164
2013	49933.35032180166
2014	52595.02542799626
2015	52726.68737820784
2016	52762.428721532495
2017	53822.90990002333
2018	54506.387071933
2019	56099.96896399949
2020	54248.54979853031
2021	56856.68538629241
2022	59699.20082655961