Year constant 2015 US$ 2011 638416912911.2412 2012 688287208367.2678 2013 732343543066.3876 2014 780417325796.785 2015 814625889818.0283 2016 857748851127.9354 2017 906668509865.6205 2018 979855906433.7041 2019 1074481263375.7461 2020 1088308484144.6626 2021 1135355467867.3076