Year	constant 2010 US$
1991	3531.24611994668
1992	3315.80315774078
1993	3614.30344614315
1994	4101.1483040125
1995	4214.09823106926
1996	4765.32269083054
1997	4717.17690180719
1998	5114.7571629572
1999	5518.61817599415
2000	6148.19287683955
2001	5598.3746052898
2002	6128.78585764852
2003	6348.1266977827
2004	6384.8763395992
2005	6480.32783328716
2006	6123.38671749377
2007	5342.27246747164
2008	4296.35644031173
2009	5012.92960784539
2010	5127.86875977138
2011	5156.81168252024
2012	5322.50764810566
2013	3948.14653113072
2014	4358.57586252167
2015	5023.43566756142
2016	6542.72673329711
2017	6985.46325246326
2018	6867.02252941479