Year	constant 2015 US$
1993	6139.435156722984
1994	6424.871410276827
1995	6063.196570453361
1996	6318.623327610535
1997	6803.80069334549
1998	6959.169958252889
1999	6741.994207772592
2000	6622.0474689003495
2001	6173.619578183708
2002	5230.987074660476
2003	5600.191174022756
2004	6070.240601378327
2005	6451.962647003181
2006	7085.166028725786
2007	7669.273295932388
2008	8143.67376678509
2009	7626.360038408564
2010	8457.967003690925
2011	9144.320494046011
2012	9141.326924671828
2013	9368.547770090601
2014	8862.27025201094
2015	9087.79573493006
2016	8922.063602691838
2017	9197.198955627864
2018	8899.789527597002
2019	8271.924771053595
2020	7194.983710264648
2021	7865.002511375426
2022	8545.858634108714
2023	8564.079870164665