Year	constant 2015 US$
1990	2074.47102553805
1991	1845.8522580751562
1992	1758.563682345315
1993	1782.8581890884354
1994	1853.1168395303146
1995	2075.083814166958
1996	2238.3281966288237
1997	2141.7152913528203
1998	2274.417949563059
1999	2182.4264902040572
2000	2219.0296693728824
2001	2437.7981736749693
2002	2658.9995932417164
2003	2902.68584893822
2004	3381.6931329551826
2005	3784.602217657925
2006	4195.6733530934025
2007	4847.498302087639
2008	5357.888699315442
2009	5059.579291499658
2010	4835.846511607127
2011	5077.944039983732
2012	5196.794013194933
2013	4957.919767949411
2014	5178.710761231583
2015	5510.522551277229
2016	5877.195980762393
2017	6595.007492796228
2018	7259.395506398282
2019	7546.51245317628
2020	7295.510129665788
2021	7877.300988522873
2022	8363.10849253007
2023	8694.156287704884