Year	constant 2010 US$
2004	3549.05661947268
2005	3589.13306373152
2006	3561.39435130178
2007	3636.87743373352
2008	3538.22117737781
2009	3476.99908977623
2010	3535.72898555867
2011	3585.37918829937
2012	3565.51135954941
2013	3738.69435932901
2014	3888.23176369908
2015	4150.6076098613