Year	constant 2015 US$
1990	1526205712.9096084
1991	2406348158.4479837
1992	3330125003.5075574
1993	4292215266.296647
1994	5955026790.547553
1995	6370423867.199361
1996	6852830367.171304
1997	5974007655.646398
1998	6078811488.185914
1999	4900835370.062799
2000	4659787575.803288
2001	4880619058.753972
2002	4936291196.394158
2003	5144012734.387816
2004	5511100275.614488
2005	5548903478.237528
2006	5550158135.166895
2007	6673267663.771432
2008	8103118659.672225
2009	10427862305.991749
2010	10434518971.172134
2011	10329915292.752676
2012	10777954801.771563
2013	11848124831.504143
2014	11231940880.308868
2015	10844253756.550581
2016	12238850611.094162
2017	12079641293.261776
2018	13091227746.970692
2019	7135533305.483261
2020	3351065471.366321
2021	1085362719.188448
2022	123885663.89110802
2023	52173232.65180175