Year	constant 2015 US$
1989	7659764108.868909
1990	7486710033.927591
1991	7246335455.074041
1992	6849637341.97585
1993	6600233010.405705
1994	6970658532.426004
1995	7413638181.08003
1996	7997848545.583048
1997	9611008095.238022
1998	10821817227.947384
1999	11144975965.474518
2000	11793222461.11074
2001	11593737598.923775
2002	11941961181.689053
2003	11843518948.020632
2004	11473586162.026316
2005	12658489814.447437
2006	13485343259.916994
2007	13482545432.477036
2008	13017649166.534399
2009	11824653032.554428
2010	11703340520.984568
2011	11996922790.297245
2012	12056247499.004406
2013	11479297210.859606
2014	12200921891.272717
2015	11795800000
2016	12007749300.215305
2017	13006820433.53568
2018	12857079740.076921
2019	12271837530.763496
2020	10089714324.315992
2021	11649478534.576344
2022	11920356527.854256
2023	12714302062.487516