Year	constant 2010 US$
1991	985.274373959365
1992	1024.58424646767
1993	896.930700961923
1994	801.674254239397
1995	835.981722438933
1996	807.284311869984
1997	783.695464444953
1998	791.499420696057
1999	690.720913002681
2000	691.727919383504
2001	737.68845482043
2002	789.97183252962
2003	818.057026715199
2004	823.855866429164
2005	825.438492846561
2006	823.31483089127
2007	823.265346626303
2008	832.380717665385
2009	791.138068001625
2010	793.304194925386
2011	820.597068932478
2012	837.200112749747
2013	894.980412503919
2014	955.720260987021
2015	1017.08267967197
2016	1035.20467768026
2017	1040.14649743854
2018	1001.86395044397