Year	constant 2010 US$
2004	2587.65228444404
2005	2379.16564531333
2006	2229.66282155193
2007	2454.97525373681
2008	2264.2190749922
2009	2215.15718989214
2010	2249.84449884189
2011	2251.56480937166
2012	2213.86573854171
2013	2145.65764982969
2014	2172.83143580398
2015	2165.45323757079