Year constant 2015 US$ 2010 17154167981.941027 2011 22892721350.3184 2012 23823766087.942173 2013 24757664836.64458 2014 24792695668.417953 2015 24766255674.37247 2016 19328649026.81145 2017 17239953389.334946 2018 14946376541.298555 2019 19854332637.04714 2020 16777514406.748718 2021 23760133374.842964 2022 29267185367.741753 2023 28621386536.441948