Year	constant 2015 US$
1995	12971349599.19648
1996	13730072237.244137
1997	14469732334.317966
1998	15937728839.903904
1999	16308674503.652342
2000	16583163554.741405
2001	18076833079.103516
2002	19137724895.835545
2003	21280167659.323044
2004	23826159122.85
2005	26066851471.82812
2006	30898005670.50234
2007	34696871294.76483
2008	31675054132.964447
2009	24573981906.260147
2010	23400453450.384758
2011	25403625717.789444
2012	26558864963.17577
2013	26920408614.68905
2014	26928644528.87616
2015	27739813841.26366
2016	28338461507.01639
2017	29673675947.903893
2018	31279941059.432407
2019	31638949473.99061
2020	30180238481.786316
2021	33438906688.887096
2022	34574195782.98709
2023	35206843361.76014