Year	constant 2015 US$
2008	2298.5805235833777
2009	2449.9276320706526
2010	2532.149277601701
2011	2607.8676275060584
2012	2675.0032906284246
2013	2755.59830352612
2014	2925.582679394995
2015	2995.3783370163014
2016	3126.2057541785484
2017	3196.9932372477383
2018	3325.1499331413806
2019	3528.6300715257803
2020	3613.839312161409
2021	3886.9165266420455
2022	4061.5873406995493
2023	4312.227276325798