Year	constant 2015 US$
2000	26461894006.90932
2001	25890969464.48044
2002	28161254724.517212
2003	29792505706.127193
2004	32581226435.24054
2005	37114048212.68062
2006	43867042260.51658
2007	47856586390.12734
2008	48800680370.893486
2009	37795413545.67911
2010	40372524899.95229
2011	41549329028.91928
2012	44999452763.54888
2013	45048946078.26905
2014	43202418291.82951
2015	43698304960.402916
2016	48716701039.850655
2017	53716909008.653984
2018	57558059205.52143
2019	57311208594.36769
2020	53982324003.1714
2021	48261794224.710365
2022	52190413022.15017
2023	52202773329.55727