Year	constant 2015 US$
2006	13273.73974312843
2007	12375.592315166738
2008	12112.686555798127
2009	12605.693256908125
2010	11607.220069835937
2011	11827.617543497854
2012	11885.516972657271
2013	11719.117342944004
2014	12793.026593783736
2015	12030.274633933357
2016	12748.753421502412
2017	12486.282246383787
2018	12950.091132722737
2019	13169.129285148347
2020	13881.978398399264
2021	15117.649846532251
2022	15984.85479129373