Year	constant 2015 US$
1997	4790089466192.081
1998	4856320309895.646
1999	4985001772282.67
2000	5297111901218.904
2001	5280889971361.617
2002	5309583048726.403
2003	5419900730153.284
2004	5638640324616.467
2005	5814708604154.408
2006	6113118030242.111
2007	6351922827281.189
2008	6287296005977.492
2009	5459490224622.568
2010	6017772165936.32
2011	6196542270945.885
2012	6201383709372.477
2013	6222048953521.665
2014	6412726150125.904
2015	6617919330504.253
2016	6719989653025.584
2017	6966591326369.805
2018	7157077075903.208
2019	7168073575341.905
2020	6797891798760.133
2021	7439183676671.989
2022	7618639890768.583