Year	constant 2015 US$
2009	514.8831269440772
2010	488.9012603304525
2011	481.67540849878066
2012	518.7476683119368
2013	278.7962965553603
2014	285.9658943656342
2015	290.04585304751777
2016	310.3754997599761
2017	306.69381074872916
2018	450.70472282504875
2019	466.0254700849007
2020	435.09445650527124
2021	437.9715025766716
2022	451.5284688252197
2023	418.66856950580114