Year	constant 2015 US$
1997	1878502855.0030115
1998	1975129709.597209
1999	1945984616.689921
2000	1985381529.0328722
2001	1969458070.0601473
2002	2052024813.122779
2003	2015061470.0846367
2004	2097536505.3202934
2005	2143069472.127402
2006	2279609344.4578943
2007	2364496777.099527
2008	2483608318.325502
2009	2560456918.458942
2010	2702875912.694376
2011	2805236545.1825304
2012	2944808872.1953893
2013	3100803885.1345487
2014	3220874646.5488667
2015	3104359892.466404
2016	3083644443.1465807
2017	3102664173.360935
2018	3158275823.035647
2019	3218504047.4077897
2020	3239452588.9812484
2021	3329556023.4545116
2022	3396528785.9435415
2023	3479917435.0018597