Year	constant 2015 US$
2011	344.1647575996232
2012	368.85033174674106
2013	401.9747481714065
2014	448.15028713048
2015	484.6130266238279
2016	541.5991918359698
2017	582.1655418509515
2018	625.30399238002
2019	676.9989872203334
2020	714.0289401086023
2021	740.5757644766148