Year	constant 2015 US$
2008	20086799554.497314
2009	21213356480.304287
2010	22744205509.614258
2011	21129274032.057465
2012	25000890741.847263
2013	26187412594.126312
2014	28315939535.08004
2015	24800859065.545757
2016	27185903418.13568
2017	28330290019.90417
2018	28962222560.758595
2019	30694733303.63635
2020	31140651775.973476
2021	32985086495.02398
2022	35329011161.58225
2023	38638346559.0696