Year	constant 2015 US$
1994	9895.468824640968
1995	9916.02897676069
1996	9694.593555338693
1997	9615.51064224978
1998	9164.414148808859
1999	8810.678409784865
2000	9069.3754847501
2001	8422.95471975488
2002	8247.971847072673
2003	8138.708536138658
2004	8087.398899609863
2005	8032.7600325027515
2006	7993.941829235371
2007	8142.2519459905325
2008	8454.138332722523
2009	8541.19957110806
2010	8869.975414473922
2011	9336.886025844396
2012	9856.980670580844
2013	10389.043805430625
2014	10770.450434274566
2015	11430.94229933904
2016	11748.252806707269
2017	11329.736611018565
2018	11429.221479596767
2019	11418.60161783654
2020	13433.206193028158
2021	12639.328819201362
2022	12247.219602391682