Year constant 2010 US$ 2010 2430.09904924561 2011 2785.79950186725 2012 3079.7830936321 2013 3456.486649732 2014 3560.82254990685 2015 3578.43392508373 2016 3540.26632846666 2017 3392.10497132291 2018 3698.02972889759